91337949 has 10 divisors (see below), whose sum is σ = 136443230. Its totient is φ = 60891912.

The previous prime is 91337947. The next prime is 91337963. The reversal of 91337949 is 94973319.

It can be written as a sum of positive squares in only one way, i.e., 85433049 + 5904900 = 9243^2 + 2430^2 .

It is not a de Polignac number, because 91337949 - 2¹ = 91337947 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 (91337947) by changing a digit.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 563734 + ... + 563895.

It is an arithmetic number, because the mean of its divisors is an integer number (13644323).

Almost surely, 2^91337949 is an apocalyptic number.

It is an amenable number.

91337949 is a deficient number, since it is larger than the sum of its proper divisors (45105281).

91337949 is a wasteful number, since it uses less digits than its factorization.

91337949 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1127641 (or 1127632 counting only the distinct ones).

The product of its digits is 183708, while the sum is 45.

The square root of 91337949 is about 9557.0889396301. The cubic root of 91337949 is about 450.3502606348.

The spelling of 91337949 in words is "ninety-one million, three hundred thirty-seven thousand, nine hundred forty-nine".