857498667 has 4 divisors (see below), whose sum is σ = 1143331560. Its totient is φ = 571665776.

The previous prime is 857498639. The next prime is 857498669. The reversal of 857498667 is 766894758.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 857498667 - 2¹⁰ = 857497643 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 857498667.

It is not an unprimeable number, because it can be changed into a prime (857498669) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 142916442 + ... + 142916447.

It is an arithmetic number, because the mean of its divisors is an integer number (285832890).

Almost surely, 2^857498667 is an apocalyptic number.

857498667 is a deficient number, since it is larger than the sum of its proper divisors (285832893).

857498667 is a wasteful number, since it uses less digits than its factorization.

857498667 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 285832892.

The product of its digits is 20321280, while the sum is 60.

The square root of 857498667 is about 29283.0781681161. The cubic root of 857498667 is about 950.0456735197.

The spelling of 857498667 in words is "eight hundred fifty-seven million, four hundred ninety-eight thousand, six hundred sixty-seven".