91474887 has 16 divisors (see below), whose sum is σ = 145451520. Its totient is φ = 49998432.

The previous prime is 91474883. The next prime is 91474897. The reversal of 91474887 is 78847419.

It is not a de Polignac number, because 91474887 - 2² = 91474883 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (91474883) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 94212 + ... + 95177.

It is an arithmetic number, because the mean of its divisors is an integer number (9090720).

Almost surely, 2^91474887 is an apocalyptic number.

91474887 is a deficient number, since it is larger than the sum of its proper divisors (53976633).

91474887 is a wasteful number, since it uses less digits than its factorization.

91474887 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 189422.

The product of its digits is 451584, while the sum is 48.

The square root of 91474887 is about 9564.2504672347. The cubic root of 91474887 is about 450.5752101065.

The spelling of 91474887 in words is "ninety-one million, four hundred seventy-four thousand, eight hundred eighty-seven".