857196791 has 6 divisors (see below), whose sum is σ = 942208176. Its totient is φ = 779269700.

The previous prime is 857196773. The next prime is 857196853. The reversal of 857196791 is 197691758.

It is a de Polignac number, because none of the positive numbers 2^k-857196791 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (857196751) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 3542015 + ... + 3542256.

It is an arithmetic number, because the mean of its divisors is an integer number (157034696).

Almost surely, 2^857196791 is an apocalyptic number.

857196791 is a deficient number, since it is larger than the sum of its proper divisors (85011385).

857196791 is a wasteful number, since it uses less digits than its factorization.

857196791 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7084293 (or 7084282 counting only the distinct ones).

The product of its digits is 952560, while the sum is 53.

The square root of 857196791 is about 29277.9232699316. The cubic root of 857196791 is about 949.9341749405.

The spelling of 857196791 in words is "eight hundred fifty-seven million, one hundred ninety-six thousand, seven hundred ninety-one".