857375949 has 8 divisors (see below), whose sum is σ = 1150840800. Its totient is φ = 567747536.

The previous prime is 857375941. The next prime is 857375963. The reversal of 857375949 is 949573758.

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 857375949 - 2³ = 857375941 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (857375941) 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, 958587 + ... + 959480.

It is an arithmetic number, because the mean of its divisors is an integer number (143855100).

Almost surely, 2^857375949 is an apocalyptic number.

It is an amenable number.

857375949 is a deficient number, since it is larger than the sum of its proper divisors (293464851).

857375949 is a wasteful number, since it uses less digits than its factorization.

857375949 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1918219.

The product of its digits is 9525600, while the sum is 57.

The square root of 857375949 is about 29280.9827191643. The cubic root of 857375949 is about 950.0003505077. Note that the first 3 decimals are identical.

The spelling of 857375949 in words is "eight hundred fifty-seven million, three hundred seventy-five thousand, nine hundred forty-nine".