91500149 has 12 divisors (see below), whose sum is σ = 101764836. Its totient is φ = 82173312.

The previous prime is 91500139. The next prime is 91500179. The reversal of 91500149 is 94100519.

It can be written as a sum of positive squares in 6 ways, for example, as 23107249 + 68392900 = 4807^2 + 8270^2 .

It is not a de Polignac number, because 91500149 - 2⁸ = 91499893 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (91500109) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1064 + ... + 13569.

It is an arithmetic number, because the mean of its divisors is an integer number (8480403).

Almost surely, 2^91500149 is an apocalyptic number.

It is an amenable number.

91500149 is a deficient number, since it is larger than the sum of its proper divisors (10264687).

91500149 is a wasteful number, since it uses less digits than its factorization.

91500149 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14696 (or 14683 counting only the distinct ones).

The product of its (nonzero) digits is 1620, while the sum is 29.

The square root of 91500149 is about 9565.5710232061. The cubic root of 91500149 is about 450.6166837236.

The spelling of 91500149 in words is "ninety-one million, five hundred thousand, one hundred forty-nine".