90007195709 has 2 divisors, whose sum is σ = 90007195710. Its totient is φ = 90007195708.

The previous prime is 90007195697. The next prime is 90007195717. The reversal of 90007195709 is 90759170009.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 82141279609 + 7865916100 = 286603^2 + 88690^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-90007195709 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (90007191709) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45003597854 + 45003597855.

It is an arithmetic number, because the mean of its divisors is an integer number (45003597855).

Almost surely, 2^90007195709 is an apocalyptic number.

It is an amenable number.

90007195709 is a deficient number, since it is larger than the sum of its proper divisors (1).

90007195709 is an equidigital number, since it uses as much as digits as its factorization.

90007195709 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 178605, while the sum is 47.

The spelling of 90007195709 in words is "ninety billion, seven million, one hundred ninety-five thousand, seven hundred nine".