90487637 has 2 divisors, whose sum is σ = 90487638. Its totient is φ = 90487636.

The previous prime is 90487591. The next prime is 90487669. The reversal of 90487637 is 73678409.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 77281681 + 13205956 = 8791^2 + 3634^2 .

It is a cyclic number.

It is not a de Polignac number, because 90487637 - 2⁸ = 90487381 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (90477637) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45243818 + 45243819.

It is an arithmetic number, because the mean of its divisors is an integer number (45243819).

Almost surely, 2^90487637 is an apocalyptic number.

It is an amenable number.

90487637 is a deficient number, since it is larger than the sum of its proper divisors (1).

90487637 is an equidigital number, since it uses as much as digits as its factorization.

90487637 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 254016, while the sum is 44.

The square root of 90487637 is about 9512.4989881734. The cubic root of 90487637 is about 448.9483871804.

The spelling of 90487637 in words is "ninety million, four hundred eighty-seven thousand, six hundred thirty-seven".