91914408 has 24 divisors (see below), whose sum is σ = 248935050. Its totient is φ = 30638112.

The previous prime is 91914379. The next prime is 91914437. The reversal of 91914408 is 80441919.

It is an interprime number because it is at equal distance from previous prime (91914379) and next prime (91914437).

It can be written as a sum of positive squares in only one way, i.e., 59629284 + 32285124 = 7722^2 + 5682^2 .

It is a tau number, because it is divible by the number of its divisors (24).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is an unprimeable number.

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, 638223 + ... + 638366.

Almost surely, 2^91914408 is an apocalyptic number.

It is an amenable number.

91914408 is an abundant number, since it is smaller than the sum of its proper divisors (157020642).

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

91914408 is a wasteful number, since it uses less digits than its factorization.

91914408 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1276601 (or 1276594 counting only the distinct ones).

The product of its (nonzero) digits is 10368, while the sum is 36.

The square root of 91914408 is about 9587.2002169559. The cubic root of 91914408 is about 451.2957026886.

The spelling of 91914408 in words is "ninety-one million, nine hundred fourteen thousand, four hundred eight".