91868718 has 16 divisors (see below), whose sum is σ = 184502736. Its totient is φ = 30495360.

The previous prime is 91868713. The next prime is 91868747. The reversal of 91868718 is 81786819.

It is a super-2 number, since 2×91868718² = 16879722693927048, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (91868713) 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, 30321 + ... + 33212.

It is an arithmetic number, because the mean of its divisors is an integer number (11531421).

Almost surely, 2^91868718 is an apocalyptic number.

91868718 is an abundant number, since it is smaller than the sum of its proper divisors (92634018).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

91868718 is a wasteful number, since it uses less digits than its factorization.

91868718 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 63779.

The product of its digits is 193536, while the sum is 48.

The square root of 91868718 is about 9584.8170561571. The cubic root of 91868718 is about 451.2209116641.

The spelling of 91868718 in words is "ninety-one million, eight hundred sixty-eight thousand, seven hundred eighteen".