90860570998909 has 2 divisors, whose sum is σ = 90860570998910. Its totient is φ = 90860570998908.

The previous prime is 90860570998871. The next prime is 90860570998957. The reversal of 90860570998909 is 90989907506809.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 90684672122500 + 175898876409 = 9522850^2 + 419403^2 .

It is an emirp because it is prime and its reverse (90989907506809) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 90860570998909 - 2²⁵ = 90860537444477 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (90860570998999) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45430285499454 + 45430285499455.

It is an arithmetic number, because the mean of its divisors is an integer number (45430285499455).

Almost surely, 2^{90860570998909} is an apocalyptic number.

It is an amenable number.

90860570998909 is a deficient number, since it is larger than the sum of its proper divisors (1).

90860570998909 is an equidigital number, since it uses as much as digits as its factorization.

90860570998909 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 793618560, while the sum is 79.

The spelling of 90860570998909 in words is "ninety trillion, eight hundred sixty billion, five hundred seventy million, nine hundred ninety-eight thousand, nine hundred nine".