91272833 has 2 divisors, whose sum is σ = 91272834. Its totient is φ = 91272832.

The previous prime is 91272817. The next prime is 91272869. The reversal of 91272833 is 33827219.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 62457409 + 28815424 = 7903^2 + 5368^2 .

It is a cyclic number.

It is not a de Polignac number, because 91272833 - 2⁴ = 91272817 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 91272793 and 91272802.

It is not a weakly prime, because it can be changed into another prime (91272803) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45636416 + 45636417.

It is an arithmetic number, because the mean of its divisors is an integer number (45636417).

Almost surely, 2^91272833 is an apocalyptic number.

It is an amenable number.

91272833 is a deficient number, since it is larger than the sum of its proper divisors (1).

91272833 is an equidigital number, since it uses as much as digits as its factorization.

91272833 is an evil number, because the sum of its binary digits is even.

The product of its digits is 18144, while the sum is 35.

The square root of 91272833 is about 9553.6816463602. The cubic root of 91272833 is about 450.2432150260.

The spelling of 91272833 in words is "ninety-one million, two hundred seventy-two thousand, eight hundred thirty-three".