90241637 has 2 divisors, whose sum is σ = 90241638. Its totient is φ = 90241636.

The previous prime is 90241609. The next prime is 90241643. The reversal of 90241637 is 73614209.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 86136961 + 4104676 = 9281^2 + 2026^2 .

It is a cyclic number.

It is not a de Polignac number, because 90241637 - 2⁶ = 90241573 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (90241607) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45120818 + 45120819.

It is an arithmetic number, because the mean of its divisors is an integer number (45120819).

Almost surely, 2^90241637 is an apocalyptic number.

It is an amenable number.

90241637 is a deficient number, since it is larger than the sum of its proper divisors (1).

90241637 is an equidigital number, since it uses as much as digits as its factorization.

90241637 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 9072, while the sum is 32.

The square root of 90241637 is about 9499.5598319080. The cubic root of 90241637 is about 448.5411804047.

The spelling of 90241637 in words is "ninety million, two hundred forty-one thousand, six hundred thirty-seven".