91964409 has 8 divisors (see below), whose sum is σ = 122663520. Its totient is φ = 61287456.

The previous prime is 91964387. The next prime is 91964413. The reversal of 91964409 is 90446919.

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

It is not a de Polignac number, because 91964409 - 2⁵ = 91964377 is a prime.

It is a super-3 number, since 3×91964409³ (a number of 25 digits) contains 333 as substring.

It is not an unprimeable number, because it can be changed into a prime (91964449) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 13422 + ... + 19080.

It is an arithmetic number, because the mean of its divisors is an integer number (15332940).

Almost surely, 2^91964409 is an apocalyptic number.

It is an amenable number.

91964409 is a deficient number, since it is larger than the sum of its proper divisors (30699111).

91964409 is a wasteful number, since it uses less digits than its factorization.

91964409 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11079.

The product of its (nonzero) digits is 69984, while the sum is 42.

The square root of 91964409 is about 9589.8075580274. The cubic root of 91964409 is about 451.3775220913.

The spelling of 91964409 in words is "ninety-one million, nine hundred sixty-four thousand, four hundred nine".