797409639 has 12 divisors (see below), whose sum is σ = 1240415176. Its totient is φ = 490713552.

The previous prime is 797409637. The next prime is 797409643. The reversal of 797409639 is 936904797.

It is not a de Polignac number, because 797409639 - 2¹ = 797409637 is a prime.

It is a super-2 number, since 2×797409639² = 1271724264740220642, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (797409631) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 3407617 + ... + 3407850.

Almost surely, 2^797409639 is an apocalyptic number.

797409639 is a deficient number, since it is larger than the sum of its proper divisors (443005537).

797409639 is a wasteful number, since it uses less digits than its factorization.

797409639 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6815486 (or 6815483 counting only the distinct ones).

The product of its (nonzero) digits is 2571912, while the sum is 54.

The square root of 797409639 is about 28238.4425739098. The cubic root of 797409639 is about 927.3147341277.

The spelling of 797409639 in words is "seven hundred ninety-seven million, four hundred nine thousand, six hundred thirty-nine".