91437087 has 48 divisors (see below), whose sum is σ = 148975200. Its totient is φ = 49674240.

The previous prime is 91437077. The next prime is 91437089. The reversal of 91437087 is 78073419.

It is not a de Polignac number, because 91437087 - 2⁶ = 91437023 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (91437089) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 379287 + ... + 379527.

It is an arithmetic number, because the mean of its divisors is an integer number (3103650).

Almost surely, 2^91437087 is an apocalyptic number.

91437087 is a deficient number, since it is larger than the sum of its proper divisors (57538113).

91437087 is a wasteful number, since it uses less digits than its factorization.

91437087 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 376 (or 369 counting only the distinct ones).

The product of its (nonzero) digits is 42336, while the sum is 39.

The square root of 91437087 is about 9562.2741541957. The cubic root of 91437087 is about 450.5131380995.

The spelling of 91437087 in words is "ninety-one million, four hundred thirty-seven thousand, eighty-seven".