91436990 has 32 divisors (see below), whose sum is σ = 169725024. Its totient is φ = 35441280.

The previous prime is 91436981. The next prime is 91437013. The reversal of 91436990 is 9963419.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 155477 + ... + 156063.

It is an arithmetic number, because the mean of its divisors is an integer number (5303907).

Almost surely, 2^91436990 is an apocalyptic number.

91436990 is a deficient number, since it is larger than the sum of its proper divisors (78288034).

91436990 is a wasteful number, since it uses less digits than its factorization.

91436990 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1052.

The product of its (nonzero) digits is 52488, while the sum is 41.

The square root of 91436990 is about 9562.2690821792. The cubic root of 91436990 is about 450.5129787922.

The spelling of 91436990 in words is "ninety-one million, four hundred thirty-six thousand, nine hundred ninety".