90906133 has 2 divisors, whose sum is σ = 90906134. Its totient is φ = 90906132.

The previous prime is 90906121. The next prime is 90906217. The reversal of 90906133 is 33160909.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 62837329 + 28068804 = 7927^2 + 5298^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-90906133 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 90906095 and 90906104.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (90906103) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45453066 + 45453067.

It is an arithmetic number, because the mean of its divisors is an integer number (45453067).

Almost surely, 2^90906133 is an apocalyptic number.

It is an amenable number.

90906133 is a deficient number, since it is larger than the sum of its proper divisors (1).

90906133 is an equidigital number, since it uses as much as digits as its factorization.

90906133 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4374, while the sum is 31.

The square root of 90906133 is about 9534.4707771328. The cubic root of 90906133 is about 449.6394362774.

The spelling of 90906133 in words is "ninety million, nine hundred six thousand, one hundred thirty-three".