91969868 has 6 divisors (see below), whose sum is σ = 160947276. Its totient is φ = 45984932.

The previous prime is 91969831. The next prime is 91969877. The reversal of 91969868 is 86896919.

It is a super-3 number, since 3×91969868³ (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, 11496230 + ... + 11496237.

It is an arithmetic number, because the mean of its divisors is an integer number (26824546).

Almost surely, 2^91969868 is an apocalyptic number.

It is an amenable number.

91969868 is a deficient number, since it is larger than the sum of its proper divisors (68977408).

91969868 is a wasteful number, since it uses less digits than its factorization.

91969868 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22992471 (or 22992469 counting only the distinct ones).

The product of its digits is 1679616, while the sum is 56.

The square root of 91969868 is about 9590.0921789105. The cubic root of 91969868 is about 451.3864531592.

The spelling of 91969868 in words is "ninety-one million, nine hundred sixty-nine thousand, eight hundred sixty-eight".