7140079021 has 4 divisors (see below), whose sum is σ = 7141419712. Its totient is φ = 7138738332.

The previous prime is 7140078983. The next prime is 7140079043. The reversal of 7140079021 is 1209700417.

7140079021 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 1209700417 = 19 ⋅63668443.

It is a cyclic number.

It is not a de Polignac number, because 7140079021 - 2⁹ = 7140078509 is a prime.

It is a super-2 number, since 2×7140079021² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7140079091) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 662325 + ... + 673018.

It is an arithmetic number, because the mean of its divisors is an integer number (1785354928).

Almost surely, 2^7140079021 is an apocalyptic number.

It is an amenable number.

7140079021 is a deficient number, since it is larger than the sum of its proper divisors (1340691).

7140079021 is a wasteful number, since it uses less digits than its factorization.

7140079021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1340690.

The product of its (nonzero) digits is 3528, while the sum is 31.

The square root of 7140079021 is about 84498.9882838842. The cubic root of 7140079021 is about 1925.6070741520.

Adding to 7140079021 its reverse (1209700417), we get a palindrome (8349779438).

The spelling of 7140079021 in words is "seven billion, one hundred forty million, seventy-nine thousand, twenty-one".