91442399 has 8 divisors (see below), whose sum is σ = 92136960. Its totient is φ = 90750976.

The previous prime is 91442387. The next prime is 91442419. The reversal of 91442399 is 99324419.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-91442399 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (91442339) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 97967 + ... + 98895.

It is an arithmetic number, because the mean of its divisors is an integer number (11517120).

Almost surely, 2^91442399 is an apocalyptic number.

91442399 is a deficient number, since it is larger than the sum of its proper divisors (694561).

91442399 is a wasteful number, since it uses less digits than its factorization.

91442399 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1569.

The product of its digits is 69984, while the sum is 41.

The square root of 91442399 is about 9562.5519083558. The cubic root of 91442399 is about 450.5218620558.

The spelling of 91442399 in words is "ninety-one million, four hundred forty-two thousand, three hundred ninety-nine".