91692889 has 2 divisors, whose sum is σ = 91692890. Its totient is φ = 91692888.

The previous prime is 91692877. The next prime is 91692907. The reversal of 91692889 is 98829619.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 52417600 + 39275289 = 7240^2 + 6267^2 .

It is a cyclic number.

It is not a de Polignac number, because 91692889 - 2²³ = 83304281 is a prime.

It is not a weakly prime, because it can be changed into another prime (91692859) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45846444 + 45846445.

It is an arithmetic number, because the mean of its divisors is an integer number (45846445).

Almost surely, 2^91692889 is an apocalyptic number.

It is an amenable number.

91692889 is a deficient number, since it is larger than the sum of its proper divisors (1).

91692889 is an equidigital number, since it uses as much as digits as its factorization.

91692889 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 559872, while the sum is 52.

The square root of 91692889 is about 9575.6403963390. The cubic root of 91692889 is about 450.9328615257.

The spelling of 91692889 in words is "ninety-one million, six hundred ninety-two thousand, eight hundred eighty-nine".