91292689 has 2 divisors, whose sum is σ = 91292690. Its totient is φ = 91292688.

The previous prime is 91292671. The next prime is 91292699. The reversal of 91292689 is 98629219.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 65739664 + 25553025 = 8108^2 + 5055^2 .

It is a cyclic number.

It is not a de Polignac number, because 91292689 - 2⁵ = 91292657 is a prime.

It is not a weakly prime, because it can be changed into another prime (91292629) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45646344 + 45646345.

It is an arithmetic number, because the mean of its divisors is an integer number (45646345).

Almost surely, 2^91292689 is an apocalyptic number.

It is an amenable number.

91292689 is a deficient number, since it is larger than the sum of its proper divisors (1).

91292689 is an equidigital number, since it uses as much as digits as its factorization.

91292689 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 139968, while the sum is 46.

The square root of 91292689 is about 9554.7207703836. The cubic root of 91292689 is about 450.2758621302.

The spelling of 91292689 in words is "ninety-one million, two hundred ninety-two thousand, six hundred eighty-nine".