91297412 has 18 divisors (see below), whose sum is σ = 169723722. Its totient is φ = 42962944.

The previous prime is 91297411. The next prime is 91297417. The reversal of 91297412 is 21479219.

It can be written as a sum of positive squares in 3 ways, for example, as 69989956 + 21307456 = 8366^2 + 4616^2 .

It is not an unprimeable number, because it can be changed into a prime (91297411) 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 in 5 ways as a sum of consecutive naturals, for example, 38333 + ... + 40644.

Almost surely, 2^91297412 is an apocalyptic number.

It is an amenable number.

91297412 is a deficient number, since it is larger than the sum of its proper divisors (78426310).

91297412 is a wasteful number, since it uses less digits than its factorization.

91297412 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 79015 (or 78996 counting only the distinct ones).

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

The square root of 91297412 is about 9554.9679224998. The cubic root of 91297412 is about 450.2836269588.

The spelling of 91297412 in words is "ninety-one million, two hundred ninety-seven thousand, four hundred twelve".