90595909 has 2 divisors, whose sum is σ = 90595910. Its totient is φ = 90595908.

The previous prime is 90595903. The next prime is 90595951. The reversal of 90595909 is 90959509.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 72080100 + 18515809 = 8490^2 + 4303^2 .

It is an emirp because it is prime and its reverse (90959509) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 90595909 - 2⁵ = 90595877 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (90595903) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45297954 + 45297955.

It is an arithmetic number, because the mean of its divisors is an integer number (45297955).

Almost surely, 2^90595909 is an apocalyptic number.

It is an amenable number.

90595909 is a deficient number, since it is larger than the sum of its proper divisors (1).

90595909 is an equidigital number, since it uses as much as digits as its factorization.

90595909 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 164025, while the sum is 46.

The square root of 90595909 is about 9518.1883255166. The cubic root of 90595909 is about 449.1273772500.

The spelling of 90595909 in words is "ninety million, five hundred ninety-five thousand, nine hundred nine".