91969216 has 14 divisors (see below), whose sum is σ = 182501540. Its totient is φ = 45984576.

The previous prime is 91969181. The next prime is 91969261. The reversal of 91969216 is 61296919.

It is a super-3 number, since 3×91969216³ (a number of 25 digits) contains 333 as substring.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 718446 + ... + 718573.

Almost surely, 2^91969216 is an apocalyptic number.

It is an amenable number.

91969216 is a deficient number, since it is larger than the sum of its proper divisors (90532324).

91969216 is a wasteful number, since it uses less digits than its factorization.

91969216 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1437031 (or 1437021 counting only the distinct ones).

The product of its digits is 52488, while the sum is 43.

The square root of 91969216 is about 9590.0581854335. The cubic root of 91969216 is about 451.3853864886.

The spelling of 91969216 in words is "ninety-one million, nine hundred sixty-nine thousand, two hundred sixteen".