90632609 has 2 divisors, whose sum is σ = 90632610. Its totient is φ = 90632608.

The previous prime is 90632567. The next prime is 90632617. The reversal of 90632609 is 90623609.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 90630400 + 2209 = 9520^2 + 47^2 .

It is an emirp because it is prime and its reverse (90623609) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-90632609 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (90632209) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45316304 + 45316305.

It is an arithmetic number, because the mean of its divisors is an integer number (45316305).

Almost surely, 2^90632609 is an apocalyptic number.

It is an amenable number.

90632609 is a deficient number, since it is larger than the sum of its proper divisors (1).

90632609 is an equidigital number, since it uses as much as digits as its factorization.

90632609 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 17496, while the sum is 35.

The square root of 90632609 is about 9520.1160182006. The cubic root of 90632609 is about 449.1880155639.

The spelling of 90632609 in words is "ninety million, six hundred thirty-two thousand, six hundred nine".