115100009 has 2 divisors, whose sum is σ = 115100010. Its totient is φ = 115100008.

The previous prime is 115100003. The next prime is 115100021. The reversal of 115100009 is 900001511.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 69672409 + 45427600 = 8347^2 + 6740^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-115100009 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 115100009.

It is not a weakly prime, because it can be changed into another prime (115100003) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 57550004 + 57550005.

It is an arithmetic number, because the mean of its divisors is an integer number (57550005).

Almost surely, 2^115100009 is an apocalyptic number.

It is an amenable number.

115100009 is a deficient number, since it is larger than the sum of its proper divisors (1).

115100009 is an equidigital number, since it uses as much as digits as its factorization.

115100009 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 45, while the sum is 17.

The square root of 115100009 is about 10728.4672250979. The cubic root of 115100009 is about 486.4353398536.

The spelling of 115100009 in words is "one hundred fifteen million, one hundred thousand, nine".