7640631 has 6 divisors (see below), whose sum is σ = 11036480. Its totient is φ = 5093748.

The previous prime is 7640621. The next prime is 7640681. The reversal of 7640631 is 1360467.

It is not a de Polignac number, because 7640631 - 2¹⁰ = 7639607 is a prime.

It is a super-2 number, since 2×7640631² = 116758484156322, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 7640595 and 7640604.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7640621) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 424471 + ... + 424488.

Almost surely, 2^7640631 is an apocalyptic number.

7640631 is a deficient number, since it is larger than the sum of its proper divisors (3395849).

7640631 is a wasteful number, since it uses less digits than its factorization.

7640631 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 848965 (or 848962 counting only the distinct ones).

The product of its (nonzero) digits is 3024, while the sum is 27.

The square root of 7640631 is about 2764.1691337543. The cubic root of 7640631 is about 196.9592621923.

The spelling of 7640631 in words is "seven million, six hundred forty thousand, six hundred thirty-one".