91039933 has 2 divisors, whose sum is σ = 91039934. Its totient is φ = 91039932.

The previous prime is 91039931. The next prime is 91039997. The reversal of 91039933 is 33993019.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 86825124 + 4214809 = 9318^2 + 2053^2 .

It is a cyclic number.

It is not a de Polignac number, because 91039933 - 2¹ = 91039931 is a prime.

Together with 91039931, it forms a pair of twin primes.

It is a junction number, because it is equal to n+sod(n) for n = 91039892 and 91039901.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (91039931) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45519966 + 45519967.

It is an arithmetic number, because the mean of its divisors is an integer number (45519967).

Almost surely, 2^91039933 is an apocalyptic number.

It is an amenable number.

91039933 is a deficient number, since it is larger than the sum of its proper divisors (1).

91039933 is an equidigital number, since it uses as much as digits as its factorization.

91039933 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 19683, while the sum is 37.

The square root of 91039933 is about 9541.4848425180. The cubic root of 91039933 is about 449.8599284209.

The spelling of 91039933 in words is "ninety-one million, thirty-nine thousand, nine hundred thirty-three".