91092641 has 2 divisors, whose sum is σ = 91092642. Its totient is φ = 91092640.

The previous prime is 91092559. The next prime is 91092643. The reversal of 91092641 is 14629019.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 88830625 + 2262016 = 9425^2 + 1504^2 .

It is a cyclic number.

It is not a de Polignac number, because 91092641 - 2¹⁰ = 91091617 is a prime.

Together with 91092643, it forms a pair of twin primes.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 91092598 and 91092607.

It is not a weakly prime, because it can be changed into another prime (91092643) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45546320 + 45546321.

It is an arithmetic number, because the mean of its divisors is an integer number (45546321).

Almost surely, 2^91092641 is an apocalyptic number.

It is an amenable number.

91092641 is a deficient number, since it is larger than the sum of its proper divisors (1).

91092641 is an equidigital number, since it uses as much as digits as its factorization.

91092641 is an evil number, because the sum of its binary digits is even.

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

The square root of 91092641 is about 9544.2464867584. The cubic root of 91092641 is about 449.9467278501.

The spelling of 91092641 in words is "ninety-one million, ninety-two thousand, six hundred forty-one".