91427912 has 8 divisors (see below), whose sum is σ = 171427350. Its totient is φ = 45713952.

The previous prime is 91427911. The next prime is 91427939. The reversal of 91427912 is 21972419.

It can be written as a sum of positive squares in only one way, i.e., 91278916 + 148996 = 9554^2 + 386^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is not an unprimeable number, because it can be changed into a prime (91427911) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5714237 + ... + 5714252.

Almost surely, 2^91427912 is an apocalyptic number.

It is an amenable number.

91427912 is a deficient number, since it is larger than the sum of its proper divisors (79999438).

91427912 is a wasteful number, since it uses less digits than its factorization.

91427912 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11428495 (or 11428491 counting only the distinct ones).

The product of its digits is 9072, while the sum is 35.

The square root of 91427912 is about 9561.7943922676. The cubic root of 91427912 is about 450.4980690998.

The spelling of 91427912 in words is "ninety-one million, four hundred twenty-seven thousand, nine hundred twelve".