90395009 has 2 divisors, whose sum is σ = 90395010. Its totient is φ = 90395008.

The previous prime is 90394981. The next prime is 90395017. The reversal of 90395009 is 90059309.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 50452609 + 39942400 = 7103^2 + 6320^2 .

It is a cyclic number.

It is not a de Polignac number, because 90395009 - 2⁸ = 90394753 is a prime.

It is a super-2 number, since 2×90395009² = 16342515304220162, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 90395009.

It is not a weakly prime, because it can be changed into another prime (90395089) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45197504 + 45197505.

It is an arithmetic number, because the mean of its divisors is an integer number (45197505).

Almost surely, 2^90395009 is an apocalyptic number.

It is an amenable number.

90395009 is a deficient number, since it is larger than the sum of its proper divisors (1).

90395009 is an equidigital number, since it uses as much as digits as its factorization.

90395009 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 10935, while the sum is 35.

The square root of 90395009 is about 9507.6289893958. The cubic root of 90395009 is about 448.7951456612.

The spelling of 90395009 in words is "ninety million, three hundred ninety-five thousand, nine".