91975106 has 4 divisors (see below), whose sum is σ = 137962662. Its totient is φ = 45987552.

The previous prime is 91975097. The next prime is 91975123. The reversal of 91975106 is 60157919.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 60157919 = 29 ⋅2074411.

It can be written as a sum of positive squares in only one way, i.e., 91374481 + 600625 = 9559^2 + 775^2 .

It is a super-2 number, since 2×91975106² = 16918840247422472, which contains 22 as substring.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 91975106.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 22993775 + ... + 22993778.

Almost surely, 2^91975106 is an apocalyptic number.

91975106 is a deficient number, since it is larger than the sum of its proper divisors (45987556).

91975106 is a wasteful number, since it uses less digits than its factorization.

91975106 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 45987555.

The product of its (nonzero) digits is 17010, while the sum is 38.

The square root of 91975106 is about 9590.3652693732. The cubic root of 91975106 is about 451.3950223330.

The spelling of 91975106 in words is "ninety-one million, nine hundred seventy-five thousand, one hundred six".