90213811 has 2 divisors, whose sum is σ = 90213812. Its totient is φ = 90213810.

The previous prime is 90213803. The next prime is 90213829. The reversal of 90213811 is 11831209.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 90213811 - 2³ = 90213803 is a prime.

It is not a weakly prime, because it can be changed into another prime (90211811) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45106905 + 45106906.

It is an arithmetic number, because the mean of its divisors is an integer number (45106906).

Almost surely, 2^90213811 is an apocalyptic number.

90213811 is a deficient number, since it is larger than the sum of its proper divisors (1).

90213811 is an equidigital number, since it uses as much as digits as its factorization.

90213811 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 432, while the sum is 25.

The square root of 90213811 is about 9498.0951248132. The cubic root of 90213811 is about 448.4950731222.

The spelling of 90213811 in words is "ninety million, two hundred thirteen thousand, eight hundred eleven".