90868858 has 4 divisors (see below), whose sum is σ = 136303290. Its totient is φ = 45434428.

The previous prime is 90868829. The next prime is 90868889. The reversal of 90868858 is 85886809.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 85886809 = 337 ⋅254857.

It can be written as a sum of positive squares in only one way, i.e., 90383049 + 485809 = 9507^2 + 697^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 22717213 + ... + 22717216.

Almost surely, 2^90868858 is an apocalyptic number.

90868858 is a deficient number, since it is larger than the sum of its proper divisors (45434432).

90868858 is a wasteful number, since it uses less digits than its factorization.

90868858 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 45434431.

The product of its (nonzero) digits is 1105920, while the sum is 52.

The square root of 90868858 is about 9532.5158274193. The cubic root of 90868858 is about 449.5779714061.

The spelling of 90868858 in words is "ninety million, eight hundred sixty-eight thousand, eight hundred fifty-eight".