91454393 has 2 divisors, whose sum is σ = 91454394. Its totient is φ = 91454392.

The previous prime is 91454369. The next prime is 91454399. The reversal of 91454393 is 39345419.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 57032704 + 34421689 = 7552^2 + 5867^2 .

It is a cyclic number.

It is not a de Polignac number, because 91454393 - 2⁶ = 91454329 is a prime.

It is not a weakly prime, because it can be changed into another prime (91454399) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45727196 + 45727197.

It is an arithmetic number, because the mean of its divisors is an integer number (45727197).

Almost surely, 2^91454393 is an apocalyptic number.

It is an amenable number.

91454393 is a deficient number, since it is larger than the sum of its proper divisors (1).

91454393 is an equidigital number, since it uses as much as digits as its factorization.

91454393 is an evil number, because the sum of its binary digits is even.

The product of its digits is 58320, while the sum is 38.

The square root of 91454393 is about 9563.1790216434. The cubic root of 91454393 is about 450.5415586919.

The spelling of 91454393 in words is "ninety-one million, four hundred fifty-four thousand, three hundred ninety-three".