90438133 has 2 divisors, whose sum is σ = 90438134. Its totient is φ = 90438132.

The previous prime is 90438107. The next prime is 90438343. The reversal of 90438133 is 33183409.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 47430769 + 43007364 = 6887^2 + 6558^2 .

It is a cyclic number.

It is not a de Polignac number, because 90438133 - 2⁹ = 90437621 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 90438095 and 90438104.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (90438833) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45219066 + 45219067.

It is an arithmetic number, because the mean of its divisors is an integer number (45219067).

Almost surely, 2^90438133 is an apocalyptic number.

It is an amenable number.

90438133 is a deficient number, since it is larger than the sum of its proper divisors (1).

90438133 is an equidigital number, since it uses as much as digits as its factorization.

90438133 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 7776, while the sum is 31.

The square root of 90438133 is about 9509.8965819824. The cubic root of 90438133 is about 448.8665019792.

The spelling of 90438133 in words is "ninety million, four hundred thirty-eight thousand, one hundred thirty-three".