857193493 has 16 divisors (see below), whose sum is σ = 1003072000. Its totient is φ = 725423040.

The previous prime is 857193419. The next prime is 857193563. The reversal of 857193493 is 394391758.

It is a de Polignac number, because none of the positive numbers 2^k-857193493 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 (857193413) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 48318 + ... + 63631.

It is an arithmetic number, because the mean of its divisors is an integer number (62692000).

Almost surely, 2^857193493 is an apocalyptic number.

It is an amenable number.

857193493 is a deficient number, since it is larger than the sum of its proper divisors (145878507).

857193493 is a wasteful number, since it uses less digits than its factorization.

857193493 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 112012.

The product of its digits is 816480, while the sum is 49.

The square root of 857193493 is about 29277.8669475766. The cubic root of 857193493 is about 949.9329566722.

The spelling of 857193493 in words is "eight hundred fifty-seven million, one hundred ninety-three thousand, four hundred ninety-three".