797138507 has 4 divisors (see below), whose sum is σ = 869605656. Its totient is φ = 724671360.

The previous prime is 797138477. The next prime is 797138509. The reversal of 797138507 is 705831797.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 797138507 - 2²² = 792944203 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (797138509) 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, 36233558 + ... + 36233579.

It is an arithmetic number, because the mean of its divisors is an integer number (217401414).

Almost surely, 2^797138507 is an apocalyptic number.

797138507 is a deficient number, since it is larger than the sum of its proper divisors (72467149).

797138507 is a wasteful number, since it uses less digits than its factorization.

797138507 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 72467148.

The product of its (nonzero) digits is 370440, while the sum is 47.

The square root of 797138507 is about 28233.6414052456. The cubic root of 797138507 is about 927.2096216118.

The spelling of 797138507 in words is "seven hundred ninety-seven million, one hundred thirty-eight thousand, five hundred seven".