91450979 has 2 divisors, whose sum is σ = 91450980. Its totient is φ = 91450978.

The previous prime is 91450963. The next prime is 91450993. The reversal of 91450979 is 97905419.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 91450979 - 2⁴ = 91450963 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (91450999) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45725489 + 45725490.

It is an arithmetic number, because the mean of its divisors is an integer number (45725490).

Almost surely, 2^91450979 is an apocalyptic number.

91450979 is a deficient number, since it is larger than the sum of its proper divisors (1).

91450979 is an equidigital number, since it uses as much as digits as its factorization.

91450979 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 102060, while the sum is 44.

The square root of 91450979 is about 9563.0005228485. Note that the first 3 decimals coincide. The cubic root of 91450979 is about 450.5359523710.

It can be divided in two parts, 91450 and 979, that added together give a palindrome (92429).

The spelling of 91450979 in words is "ninety-one million, four hundred fifty thousand, nine hundred seventy-nine".