91459399 has 2 divisors, whose sum is σ = 91459400. Its totient is φ = 91459398.

The previous prime is 91459373. The next prime is 91459411. The reversal of 91459399 is 99395419.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 91459399 - 2⁵ = 91459367 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (91459309) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45729699 + 45729700.

It is an arithmetic number, because the mean of its divisors is an integer number (45729700).

Almost surely, 2^91459399 is an apocalyptic number.

91459399 is a deficient number, since it is larger than the sum of its proper divisors (1).

91459399 is an equidigital number, since it uses as much as digits as its factorization.

91459399 is an evil number, because the sum of its binary digits is even.

The product of its digits is 393660, while the sum is 49.

The square root of 91459399 is about 9563.4407511104. The cubic root of 91459399 is about 450.5497790730.

The spelling of 91459399 in words is "ninety-one million, four hundred fifty-nine thousand, three hundred ninety-nine".