91419451 has 2 divisors, whose sum is σ = 91419452. Its totient is φ = 91419450.

The previous prime is 91419413. The next prime is 91419487. The reversal of 91419451 is 15491419.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 91419451 - 2⁷ = 91419323 is a prime.

It is a super-2 number, since 2×91419451² = 16715032042282802, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (91419551) 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 as a sum of consecutive naturals, namely, 45709725 + 45709726.

It is an arithmetic number, because the mean of its divisors is an integer number (45709726).

Almost surely, 2^91419451 is an apocalyptic number.

91419451 is a deficient number, since it is larger than the sum of its proper divisors (1).

91419451 is an equidigital number, since it uses as much as digits as its factorization.

91419451 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 6480, while the sum is 34.

The square root of 91419451 is about 9561.3519441552. The cubic root of 91419451 is about 450.4841718786.

The spelling of 91419451 in words is "ninety-one million, four hundred nineteen thousand, four hundred fifty-one".