91944319 has 2 divisors, whose sum is σ = 91944320. Its totient is φ = 91944318.

The previous prime is 91944283. The next prime is 91944323. The reversal of 91944319 is 91344919.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 91944319 - 2⁹ = 91943807 is a prime.

It is a super-2 number, since 2×91944319² = 16907515592747522, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (91944379) by changing a digit.

It is a good prime.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45972159 + 45972160.

It is an arithmetic number, because the mean of its divisors is an integer number (45972160).

Almost surely, 2^91944319 is an apocalyptic number.

91944319 is a deficient number, since it is larger than the sum of its proper divisors (1).

91944319 is an equidigital number, since it uses as much as digits as its factorization.

91944319 is an evil number, because the sum of its binary digits is even.

The product of its digits is 34992, while the sum is 40.

The square root of 91944319 is about 9588.7600345404. The cubic root of 91944319 is about 451.3446512777.

The spelling of 91944319 in words is "ninety-one million, nine hundred forty-four thousand, three hundred nineteen".