2500309897 has 2 divisors, whose sum is σ = 2500309898. Its totient is φ = 2500309896.

The previous prime is 2500309871. The next prime is 2500309913. The reversal of 2500309897 is 7989030052.

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., 2352347001 + 147962896 = 48501^2 + 12164^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2500309897 is a prime.

It is not a weakly prime, because it can be changed into another prime (2500309597) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1250154948 + 1250154949.

It is an arithmetic number, because the mean of its divisors is an integer number (1250154949).

Almost surely, 2^2500309897 is an apocalyptic number.

It is an amenable number.

2500309897 is a deficient number, since it is larger than the sum of its proper divisors (1).

2500309897 is an equidigital number, since it uses as much as digits as its factorization.

2500309897 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 136080, while the sum is 43.

The square root of 2500309897 is about 50003.0988739698. The cubic root of 2500309897 is about 1357.2648853055.

The spelling of 2500309897 in words is "two billion, five hundred million, three hundred nine thousand, eight hundred ninety-seven".