91408651 has 2 divisors, whose sum is σ = 91408652. Its totient is φ = 91408650.

The previous prime is 91408549. The next prime is 91408661. The reversal of 91408651 is 15680419.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 91408651 - 2²³ = 83020043 is a prime.

It is not a weakly prime, because it can be changed into another prime (91408661) 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 as a sum of consecutive naturals, namely, 45704325 + 45704326.

It is an arithmetic number, because the mean of its divisors is an integer number (45704326).

Almost surely, 2^91408651 is an apocalyptic number.

91408651 is a deficient number, since it is larger than the sum of its proper divisors (1).

91408651 is an equidigital number, since it uses as much as digits as its factorization.

91408651 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 8640, while the sum is 34.

The square root of 91408651 is about 9560.7871537860. The cubic root of 91408651 is about 450.4664315961.

The spelling of 91408651 in words is "ninety-one million, four hundred eight thousand, six hundred fifty-one".