797138513 has 8 divisors (see below), whose sum is σ = 813730176. Its totient is φ = 780696000.

The previous prime is 797138509. The next prime is 797138539. The reversal of 797138513 is 315831797.

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 797138513 - 2² = 797138509 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (797138413) 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, 26456 + ... + 47897.

It is an arithmetic number, because the mean of its divisors is an integer number (101716272).

Almost surely, 2^797138513 is an apocalyptic number.

It is an amenable number.

797138513 is a deficient number, since it is larger than the sum of its proper divisors (16591663).

797138513 is a wasteful number, since it uses less digits than its factorization.

797138513 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 74575.

The product of its digits is 158760, while the sum is 44.

The square root of 797138513 is about 28233.6415115018. The cubic root of 797138513 is about 927.2096239382.

The spelling of 797138513 in words is "seven hundred ninety-seven million, one hundred thirty-eight thousand, five hundred thirteen".