90240133 has 2 divisors, whose sum is σ = 90240134. Its totient is φ = 90240132.

The previous prime is 90240113. The next prime is 90240149. The reversal of 90240133 is 33104209.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 86992929 + 3247204 = 9327^2 + 1802^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-90240133 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (90240103) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45120066 + 45120067.

It is an arithmetic number, because the mean of its divisors is an integer number (45120067).

Almost surely, 2^90240133 is an apocalyptic number.

It is an amenable number.

90240133 is a deficient number, since it is larger than the sum of its proper divisors (1).

90240133 is an equidigital number, since it uses as much as digits as its factorization.

90240133 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 648, while the sum is 22.

The square root of 90240133 is about 9499.4806700156. The cubic root of 90240133 is about 448.5386885406.

It can be divided in two parts, 9024013 and 3, that added together give a square (9024016 = 3004²).

The spelling of 90240133 in words is "ninety million, two hundred forty thousand, one hundred thirty-three".