2609987971 has 2 divisors, whose sum is σ = 2609987972. Its totient is φ = 2609987970.

The previous prime is 2609987909. The next prime is 2609987981. The reversal of 2609987971 is 1797899062.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 2609987971 - 2⁷ = 2609987843 is a prime.

It is a super-3 number, since 3×2609987971³ (a number of 29 digits) contains 333 as substring.

It is not a weakly prime, because it can be changed into another prime (2609987981) 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, 1304993985 + 1304993986.

It is an arithmetic number, because the mean of its divisors is an integer number (1304993986).

Almost surely, 2^2609987971 is an apocalyptic number.

2609987971 is a deficient number, since it is larger than the sum of its proper divisors (1).

2609987971 is an equidigital number, since it uses as much as digits as its factorization.

2609987971 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3429216, while the sum is 58.

The square root of 2609987971 is about 51088.0413697765. The cubic root of 2609987971 is about 1376.8274053694.

The spelling of 2609987971 in words is "two billion, six hundred nine million, nine hundred eighty-seven thousand, nine hundred seventy-one".