91963685 has 16 divisors (see below), whose sum is σ = 123645312. Its totient is φ = 65073600.

The previous prime is 91963679. The next prime is 91963687. The reversal of 91963685 is 58636919.

It is a de Polignac number, because none of the positive numbers 2^k-91963685 is a prime.

It is a super-3 number, since 3×91963685³ (a number of 25 digits) contains 333 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 (91963687) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 20561 + ... + 24630.

It is an arithmetic number, because the mean of its divisors is an integer number (7727832).

Almost surely, 2^91963685 is an apocalyptic number.

It is an amenable number.

91963685 is a deficient number, since it is larger than the sum of its proper divisors (31681627).

91963685 is a wasteful number, since it uses less digits than its factorization.

91963685 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 45244.

The product of its digits is 349920, while the sum is 47.

The square root of 91963685 is about 9589.7698095418. The cubic root of 91963685 is about 451.3763375817.

The spelling of 91963685 in words is "ninety-one million, nine hundred sixty-three thousand, six hundred eighty-five".