91419413 has 2 divisors, whose sum is σ = 91419414. Its totient is φ = 91419412.

The previous prime is 91419407. The next prime is 91419451. The reversal of 91419413 is 31491419.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 87740689 + 3678724 = 9367^2 + 1918^2 .

It is a cyclic number.

It is not a de Polignac number, because 91419413 - 2⁸ = 91419157 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 91419413.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (91419113) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45709706 + 45709707.

It is an arithmetic number, because the mean of its divisors is an integer number (45709707).

Almost surely, 2^91419413 is an apocalyptic number.

It is an amenable number.

91419413 is a deficient number, since it is larger than the sum of its proper divisors (1).

91419413 is an equidigital number, since it uses as much as digits as its factorization.

91419413 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3888, while the sum is 32.

The square root of 91419413 is about 9561.3499569883. The cubic root of 91419413 is about 450.4841094615.

The spelling of 91419413 in words is "ninety-one million, four hundred nineteen thousand, four hundred thirteen".