91900216 has 16 divisors (see below), whose sum is σ = 173267640. Its totient is φ = 45695520.

The previous prime is 91900201. The next prime is 91900241. The reversal of 91900216 is 61200919.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 30286 + ... + 33181.

Almost surely, 2^91900216 is an apocalyptic number.

It is an amenable number.

91900216 is a deficient number, since it is larger than the sum of its proper divisors (81367424).

91900216 is a wasteful number, since it uses less digits than its factorization.

91900216 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 63654 (or 63650 counting only the distinct ones).

The product of its (nonzero) digits is 972, while the sum is 28.

The square root of 91900216 is about 9586.4600348617. The cubic root of 91900216 is about 451.2724741277.

The spelling of 91900216 in words is "ninety-one million, nine hundred thousand, two hundred sixteen".