857489697 has 24 divisors (see below), whose sum is σ = 1256411520. Its totient is φ = 563488800.

The previous prime is 857489693. The next prime is 857489701. The reversal of 857489697 is 796984758.

It is an interprime number because it is at equal distance from previous prime (857489693) and next prime (857489701).

It is not a de Polignac number, because 857489697 - 2² = 857489693 is a prime.

It is a super-2 number, since 2×857489697² = 1470577160922303618, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (857489693) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 215278 + ... + 219224.

It is an arithmetic number, because the mean of its divisors is an integer number (52350480).

Almost surely, 2^857489697 is an apocalyptic number.

It is an amenable number.

857489697 is a deficient number, since it is larger than the sum of its proper divisors (398921823).

857489697 is a wasteful number, since it uses less digits than its factorization.

857489697 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4293 (or 4290 counting only the distinct ones).

The product of its digits is 30481920, while the sum is 63.

The square root of 857489697 is about 29282.9250075876. The cubic root of 857489697 is about 950.0423608073.

The spelling of 857489697 in words is "eight hundred fifty-seven million, four hundred eighty-nine thousand, six hundred ninety-seven".