90868857 has 8 divisors (see below), whose sum is σ = 121230720. Its totient is φ = 60543120.

The previous prime is 90868829. The next prime is 90868889. The reversal of 90868857 is 75886809.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 90868857 - 2⁶ = 90868793 is a prime.

It is not an unprimeable number, because it can be changed into a prime (90868807) 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, 2482 + ... + 13707.

It is an arithmetic number, because the mean of its divisors is an integer number (15153840).

Almost surely, 2^90868857 is an apocalyptic number.

It is an amenable number.

90868857 is a deficient number, since it is larger than the sum of its proper divisors (30361863).

90868857 is a wasteful number, since it uses less digits than its factorization.

90868857 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18063.

The product of its (nonzero) digits is 967680, while the sum is 51.

The square root of 90868857 is about 9532.5157749673. The cubic root of 90868857 is about 449.5779697569.

The spelling of 90868857 in words is "ninety million, eight hundred sixty-eight thousand, eight hundred fifty-seven".