2500900109 has 2 divisors, whose sum is σ = 2500900110. Its totient is φ = 2500900108.

The previous prime is 2500900091. The next prime is 2500900117. The reversal of 2500900109 is 9010090052.

It is a happy number.

Together with previous prime (2500900091) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1898344900 + 602555209 = 43570^2 + 24547^2 .

It is a cyclic number.

It is not a de Polignac number, because 2500900109 - 2⁸ = 2500899853 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2500903109) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1250450054 + 1250450055.

It is an arithmetic number, because the mean of its divisors is an integer number (1250450055).

Almost surely, 2^2500900109 is an apocalyptic number.

It is an amenable number.

2500900109 is a deficient number, since it is larger than the sum of its proper divisors (1).

2500900109 is an equidigital number, since it uses as much as digits as its factorization.

2500900109 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 810, while the sum is 26.

The square root of 2500900109 is about 50009.0002799496. Note that the first 3 decimals coincide. The cubic root of 2500900109 is about 1357.3716735346.

The spelling of 2500900109 in words is "two billion, five hundred million, nine hundred thousand, one hundred nine".