91260137 has 8 divisors (see below), whose sum is σ = 93691080. Its totient is φ = 88839040.

The previous prime is 91260119. The next prime is 91260139. The reversal of 91260137 is 73106219.

It can be written as a sum of positive squares in 4 ways, for example, as 8886361 + 82373776 = 2981^2 + 9076^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 91260137 - 2²⁶ = 24151273 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (91260139) 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, 18683 + ... + 23055.

It is an arithmetic number, because the mean of its divisors is an integer number (11711385).

Almost surely, 2^91260137 is an apocalyptic number.

It is an amenable number.

91260137 is a deficient number, since it is larger than the sum of its proper divisors (2430943).

91260137 is a wasteful number, since it uses less digits than its factorization.

91260137 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4923.

The product of its (nonzero) digits is 2268, while the sum is 29.

The square root of 91260137 is about 9553.0171673665. The cubic root of 91260137 is about 450.2223378649. Note that the first 3 decimals are identical.

The spelling of 91260137 in words is "ninety-one million, two hundred sixty thousand, one hundred thirty-seven".