90543637 has 2 divisors, whose sum is σ = 90543638. Its totient is φ = 90543636.

The previous prime is 90543631. The next prime is 90543641. The reversal of 90543637 is 73634509.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 63856081 + 26687556 = 7991^2 + 5166^2 .

It is a cyclic number.

It is not a de Polignac number, because 90543637 - 2¹⁵ = 90510869 is a prime.

It is a Chen prime.

It is equal to p_5246767 and since 90543637 and 5246767 have the same sum of digits, it is a Honaker prime.

It is a junction number, because it is equal to n+sod(n) for n = 90543596 and 90543605.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (90543631) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45271818 + 45271819.

It is an arithmetic number, because the mean of its divisors is an integer number (45271819).

Almost surely, 2^90543637 is an apocalyptic number.

It is an amenable number.

90543637 is a deficient number, since it is larger than the sum of its proper divisors (1).

90543637 is an equidigital number, since it uses as much as digits as its factorization.

90543637 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 68040, while the sum is 37.

The square root of 90543637 is about 9515.4420286185. The cubic root of 90543637 is about 449.0409815058.

The spelling of 90543637 in words is "ninety million, five hundred forty-three thousand, six hundred thirty-seven".