91235461 has 2 divisors, whose sum is σ = 91235462. Its totient is φ = 91235460.

The previous prime is 91235429. The next prime is 91235471. The reversal of 91235461 is 16453219.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 90611361 + 624100 = 9519^2 + 790^2 .

It is a cyclic number.

It is not a de Polignac number, because 91235461 - 2⁵ = 91235429 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (91235401) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45617730 + 45617731.

It is an arithmetic number, because the mean of its divisors is an integer number (45617731).

Almost surely, 2^91235461 is an apocalyptic number.

It is an amenable number.

91235461 is a deficient number, since it is larger than the sum of its proper divisors (1).

91235461 is an equidigital number, since it uses as much as digits as its factorization.

91235461 is an evil number, because the sum of its binary digits is even.

The product of its digits is 6480, while the sum is 31.

The square root of 91235461 is about 9551.7255509149. The cubic root of 91235461 is about 450.1817553855.

The spelling of 91235461 in words is "ninety-one million, two hundred thirty-five thousand, four hundred sixty-one".