91936669 has 16 divisors (see below), whose sum is σ = 103956480. Its totient is φ = 80550000.

The previous prime is 91936643. The next prime is 91936679. The reversal of 91936669 is 96663919.

It is a cyclic number.

It is not a de Polignac number, because 91936669 - 2¹³ = 91928477 is a prime.

It is a super-2 number, since 2×91936669² = 16904702213631122, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (91936639) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 122044 + ... + 122794.

It is an arithmetic number, because the mean of its divisors is an integer number (6497280).

Almost surely, 2^91936669 is an apocalyptic number.

It is an amenable number.

91936669 is a deficient number, since it is larger than the sum of its proper divisors (12019811).

91936669 is a wasteful number, since it uses less digits than its factorization.

91936669 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1152.

The product of its digits is 472392, while the sum is 49.

The square root of 91936669 is about 9588.3611216933. The cubic root of 91936669 is about 451.3321332582.

The spelling of 91936669 in words is "ninety-one million, nine hundred thirty-six thousand, six hundred sixty-nine".