91344393 has 12 divisors (see below), whose sum is σ = 150790848. Its totient is φ = 52196760.

The previous prime is 91344373. The next prime is 91344397. The reversal of 91344393 is 39344319.

It is a de Polignac number, because none of the positive numbers 2^k-91344393 is a prime.

It is not an unprimeable number, because it can be changed into a prime (91344397) 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 11 ways as a sum of consecutive naturals, for example, 724893 + ... + 725018.

It is an arithmetic number, because the mean of its divisors is an integer number (12565904).

Almost surely, 2^91344393 is an apocalyptic number.

It is an amenable number.

91344393 is a deficient number, since it is larger than the sum of its proper divisors (59446455).

91344393 is a wasteful number, since it uses less digits than its factorization.

91344393 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1449924 (or 1449921 counting only the distinct ones).

The product of its digits is 34992, while the sum is 36.

The square root of 91344393 is about 9557.4260656309. The cubic root of 91344393 is about 450.3608512997.

The spelling of 91344393 in words is "ninety-one million, three hundred forty-four thousand, three hundred ninety-three".