91963922 has 6 divisors (see below), whose sum is σ = 137966229. Its totient is φ = 45975180.

The previous prime is 91963909. The next prime is 91963939. The reversal of 91963922 is 22936919.

It can be written as a sum of positive squares in 2 ways, for example, as 91565761 + 398161 = 9569^2 + 631^2 .

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=6781.

It is a super-3 number, since 3×91963922³ (a number of 25 digits) contains 333 as substring.

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 91963922.

It is an unprimeable number.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 10172 + ... + 16952.

Almost surely, 2^91963922 is an apocalyptic number.

91963922 is a deficient number, since it is larger than the sum of its proper divisors (46002307).

91963922 is an frugal number, since it uses more digits than its factorization.

91963922 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13564 (or 6783 counting only the distinct ones).

The product of its digits is 52488, while the sum is 41.

The square root of 91963922 is about 9589.7821664520. The cubic root of 91963922 is about 451.3767253293.

Multiplying 91963922 by its product of digits (52488), we get a square (4827002337936 = 2197044²).

The spelling of 91963922 in words is "ninety-one million, nine hundred sixty-three thousand, nine hundred twenty-two".