91935289 has 2 divisors, whose sum is σ = 91935290. Its totient is φ = 91935288.

The previous prime is 91935257. The next prime is 91935313. The reversal of 91935289 is 98253919.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 81144064 + 10791225 = 9008^2 + 3285^2 .

It is a cyclic number.

It is not a de Polignac number, because 91935289 - 2⁵ = 91935257 is a prime.

It is not a weakly prime, because it can be changed into another prime (91935989) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45967644 + 45967645.

It is an arithmetic number, because the mean of its divisors is an integer number (45967645).

Almost surely, 2^91935289 is an apocalyptic number.

It is an amenable number.

91935289 is a deficient number, since it is larger than the sum of its proper divisors (1).

91935289 is an equidigital number, since it uses as much as digits as its factorization.

91935289 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 174960, while the sum is 46.

The square root of 91935289 is about 9588.2891591775. The cubic root of 91935289 is about 451.3298750317.

The spelling of 91935289 in words is "ninety-one million, nine hundred thirty-five thousand, two hundred eighty-nine".