7639669 has 8 divisors (see below), whose sum is σ = 7795160. Its totient is φ = 7485696.

The previous prime is 7639663. The next prime is 7639699. The reversal of 7639669 is 9669367.

It can be written as a sum of positive squares in 4 ways, for example, as 4622500 + 3017169 = 2150^2 + 1737^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 7639669 - 2⁵ = 7639637 is a prime.

It is a super-2 number, since 2×7639669² = 116729084859122, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7639663) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 16489 + ... + 16945.

It is an arithmetic number, because the mean of its divisors is an integer number (974395).

Almost surely, 2^7639669 is an apocalyptic number.

It is an amenable number.

7639669 is a deficient number, since it is larger than the sum of its proper divisors (155491).

7639669 is a wasteful number, since it uses less digits than its factorization.

7639669 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 759.

The product of its digits is 367416, while the sum is 46.

The square root of 7639669 is about 2763.9951157699. The cubic root of 7639669 is about 196.9509957388.

The spelling of 7639669 in words is "seven million, six hundred thirty-nine thousand, six hundred sixty-nine".