91883412 has 18 divisors (see below), whose sum is σ = 232260938. Its totient is φ = 30627792.

The previous prime is 91883381. The next prime is 91883417. The reversal of 91883412 is 21438819.

It can be written as a sum of positive squares in only one way, i.e., 72488196 + 19395216 = 8514^2 + 4404^2 .

It is a tau number, because it is divible by the number of its divisors (18).

It is a super-2 number, since 2×91883412² = 16885122801523488, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (36), and also a Moran number because the ratio is a prime number: 2552317 = 91883412 / (9 + 1 + 8 + 8 + 3 + 4 + 1 + 2).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (91883417) 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 5 ways as a sum of consecutive naturals, for example, 1276123 + ... + 1276194.

Almost surely, 2^91883412 is an apocalyptic number.

It is an amenable number.

91883412 is an abundant number, since it is smaller than the sum of its proper divisors (140377526).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

91883412 is a wasteful number, since it uses less digits than its factorization.

91883412 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2552327 (or 2552322 counting only the distinct ones).

The product of its digits is 13824, while the sum is 36.

The square root of 91883412 is about 9585.5835503114. The cubic root of 91883412 is about 451.2449673193.

The spelling of 91883412 in words is "ninety-one million, eight hundred eighty-three thousand, four hundred twelve".