90867715 has 4 divisors (see below), whose sum is σ = 109041264. Its totient is φ = 72694168.

The previous prime is 90867713. The next prime is 90867719. The reversal of 90867715 is 51776809.

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 90867715 - 2¹ = 90867713 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (90867713) 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, 9086767 + ... + 9086776.

It is an arithmetic number, because the mean of its divisors is an integer number (27260316).

Almost surely, 2^90867715 is an apocalyptic number.

90867715 is a deficient number, since it is larger than the sum of its proper divisors (18173549).

90867715 is a wasteful number, since it uses less digits than its factorization.

90867715 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18173548.

The product of its (nonzero) digits is 105840, while the sum is 43.

The square root of 90867715 is about 9532.4558745373. The cubic root of 90867715 is about 449.5760863826.

The spelling of 90867715 in words is "ninety million, eight hundred sixty-seven thousand, seven hundred fifteen".