91370196 has 18 divisors (see below), whose sum is σ = 230963642. Its totient is φ = 30456720.

The previous prime is 91370179. The next prime is 91370197. The reversal of 91370196 is 69107319.

It can be written as a sum of positive squares in only one way, i.e., 55800900 + 35569296 = 7470^2 + 5964^2 .

It is a tau number, because it is divible by the number of its divisors (18).

It is a Harshad number since it is a multiple of its sum of digits (36), and also a Moran number because the ratio is a prime number: 2538061 = 91370196 / (9 + 1 + 3 + 7 + 0 + 1 + 9 + 6).

It is a self number, because there is not a number n which added to its sum of digits gives 91370196.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (91370197) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1268995 + ... + 1269066.

Almost surely, 2^91370196 is an apocalyptic number.

It is an amenable number.

91370196 is an abundant number, since it is smaller than the sum of its proper divisors (139593446).

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

91370196 is a wasteful number, since it uses less digits than its factorization.

91370196 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2538071 (or 2538066 counting only the distinct ones).

The product of its (nonzero) digits is 10206, while the sum is 36.

The square root of 91370196 is about 9558.7758630486. The cubic root of 91370196 is about 450.4032533441.

The spelling of 91370196 in words is "ninety-one million, three hundred seventy thousand, one hundred ninety-six".