797392157 has 8 divisors (see below), whose sum is σ = 844975800. Its totient is φ = 749883904.

The previous prime is 797392147. The next prime is 797392159. The reversal of 797392157 is 751293797.

It can be written as a sum of positive squares in 4 ways, for example, as 573171481 + 224220676 = 23941^2 + 14974^2 .

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 797392157 - 2⁶ = 797392093 is a prime.

It is a super-2 number, since 2×797392157² = 1271668504090225298, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (797392159) 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, 3719 + ... + 40107.

It is an arithmetic number, because the mean of its divisors is an integer number (105621975).

Almost surely, 2^797392157 is an apocalyptic number.

It is an amenable number.

797392157 is a deficient number, since it is larger than the sum of its proper divisors (47583643).

797392157 is a wasteful number, since it uses less digits than its factorization.

797392157 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 37695.

The product of its digits is 833490, while the sum is 50.

The square root of 797392157 is about 28238.1330296463. The cubic root of 797392157 is about 927.3079574206.

The spelling of 797392157 in words is "seven hundred ninety-seven million, three hundred ninety-two thousand, one hundred fifty-seven".