90911833 has 2 divisors, whose sum is σ = 90911834. Its totient is φ = 90911832.

The previous prime is 90911819. The next prime is 90911837. The reversal of 90911833 is 33811909.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 89813529 + 1098304 = 9477^2 + 1048^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-90911833 is a prime.

It is a super-2 number, since 2×90911833² = 16529922758839778, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (90911837) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45455916 + 45455917.

It is an arithmetic number, because the mean of its divisors is an integer number (45455917).

Almost surely, 2^90911833 is an apocalyptic number.

It is an amenable number.

90911833 is a deficient number, since it is larger than the sum of its proper divisors (1).

90911833 is an equidigital number, since it uses as much as digits as its factorization.

90911833 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5832, while the sum is 34.

The square root of 90911833 is about 9534.7696878320. The cubic root of 90911833 is about 449.6488338510.

The spelling of 90911833 in words is "ninety million, nine hundred eleven thousand, eight hundred thirty-three".