7940423453 has 4 divisors (see below), whose sum is σ = 7975403520. Its totient is φ = 7905443388.

The previous prime is 7940423429. The next prime is 7940423467. The reversal of 7940423453 is 3543240497.

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.

It is a cyclic number.

It is not a de Polignac number, because 7940423453 - 2²⁸ = 7671987997 is a prime.

It is a super-2 number, since 2×7940423453² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 7940423453.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7940425453) 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, 17489693 + ... + 17490146.

It is an arithmetic number, because the mean of its divisors is an integer number (1993850880).

Almost surely, 2^7940423453 is an apocalyptic number.

It is an amenable number.

7940423453 is a deficient number, since it is larger than the sum of its proper divisors (34980067).

7940423453 is a wasteful number, since it uses less digits than its factorization.

7940423453 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34980066.

The product of its (nonzero) digits is 362880, while the sum is 41.

The square root of 7940423453 is about 89109.0537094857. The cubic root of 7940423453 is about 1995.0229123232.

The spelling of 7940423453 in words is "seven billion, nine hundred forty million, four hundred twenty-three thousand, four hundred fifty-three".