7840490901 has 4 divisors (see below), whose sum is σ = 10453987872. Its totient is φ = 5226993932.

The previous prime is 7840490893. The next prime is 7840490921. The reversal of 7840490901 is 1090940487.

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 7840490901 - 2³ = 7840490893 is a prime.

It is a super-2 number, since 2×7840490901² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7840490921) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1306748481 + ... + 1306748486.

It is an arithmetic number, because the mean of its divisors is an integer number (2613496968).

Almost surely, 2^7840490901 is an apocalyptic number.

It is an amenable number.

7840490901 is a deficient number, since it is larger than the sum of its proper divisors (2613496971).

7840490901 is a wasteful number, since it uses less digits than its factorization.

7840490901 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2613496970.

The product of its (nonzero) digits is 72576, while the sum is 42.

The square root of 7840490901 is about 88546.5465221541. The cubic root of 7840490901 is about 1986.6182390108.

The spelling of 7840490901 in words is "seven billion, eight hundred forty million, four hundred ninety thousand, nine hundred one".