90336509 has 2 divisors, whose sum is σ = 90336510. Its totient is φ = 90336508.

The previous prime is 90336473. The next prime is 90336523. The reversal of 90336509 is 90563309.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 48372025 + 41964484 = 6955^2 + 6478^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-90336509 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (90336529) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45168254 + 45168255.

It is an arithmetic number, because the mean of its divisors is an integer number (45168255).

Almost surely, 2^90336509 is an apocalyptic number.

It is an amenable number.

90336509 is a deficient number, since it is larger than the sum of its proper divisors (1).

90336509 is an equidigital number, since it uses as much as digits as its factorization.

90336509 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 21870, while the sum is 35.

The square root of 90336509 is about 9504.5520146927. The cubic root of 90336509 is about 448.6983107365.

The spelling of 90336509 in words is "ninety million, three hundred thirty-six thousand, five hundred nine".