91397022 has 32 divisors (see below), whose sum is σ = 187971840. Its totient is φ = 29615040.

The previous prime is 91397017. The next prime is 91397023. The reversal of 91397022 is 22079319.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (91397023) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 29629 + ... + 32567.

It is an arithmetic number, because the mean of its divisors is an integer number (5874120).

Almost surely, 2^91397022 is an apocalyptic number.

91397022 is an abundant number, since it is smaller than the sum of its proper divisors (96574818).

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

91397022 is a wasteful number, since it uses less digits than its factorization.

91397022 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3088.

The product of its (nonzero) digits is 6804, while the sum is 33.

The square root of 91397022 is about 9560.1789732201. The cubic root of 91397022 is about 450.4473280203.

It can be divided in two parts, 9139 and 7022, that added together give a palindrome (16161).

The spelling of 91397022 in words is "ninety-one million, three hundred ninety-seven thousand, twenty-two".