91566733 has 2 divisors, whose sum is σ = 91566734. Its totient is φ = 91566732.

The previous prime is 91566731. The next prime is 91566751. The reversal of 91566733 is 33766519.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 57426084 + 34140649 = 7578^2 + 5843^2 .

It is a cyclic number.

It is not a de Polignac number, because 91566733 - 2¹ = 91566731 is a prime.

Together with 91566731, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (91566731) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45783366 + 45783367.

It is an arithmetic number, because the mean of its divisors is an integer number (45783367).

Almost surely, 2^91566733 is an apocalyptic number.

It is an amenable number.

91566733 is a deficient number, since it is larger than the sum of its proper divisors (1).

91566733 is an equidigital number, since it uses as much as digits as its factorization.

91566733 is an evil number, because the sum of its binary digits is even.

The product of its digits is 102060, while the sum is 40.

The square root of 91566733 is about 9569.0507888714. The cubic root of 91566733 is about 450.7259607272.

It can be divided in two parts, 9156673 and 3, that added together give a square (9156676 = 3026²).

The spelling of 91566733 in words is "ninety-one million, five hundred sixty-six thousand, seven hundred thirty-three".