91309927 has 8 divisors (see below), whose sum is σ = 92005632. Its totient is φ = 90617400.

The previous prime is 91309913. The next prime is 91309943. The reversal of 91309927 is 72990319.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-91309927 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 91309927.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (91309957) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 93552 + ... + 94522.

It is an arithmetic number, because the mean of its divisors is an integer number (11500704).

Almost surely, 2^91309927 is an apocalyptic number.

91309927 is a deficient number, since it is larger than the sum of its proper divisors (695705).

91309927 is a wasteful number, since it uses less digits than its factorization.

91309927 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1589.

The product of its (nonzero) digits is 30618, while the sum is 40.

The square root of 91309927 is about 9555.6227949831. The cubic root of 91309927 is about 450.3042008976.

The spelling of 91309927 in words is "ninety-one million, three hundred nine thousand, nine hundred twenty-seven".