130256639 has 2 divisors, whose sum is σ = 130256640. Its totient is φ = 130256638.

The previous prime is 130256617. The next prime is 130256641. The reversal of 130256639 is 936652031.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 130256639 - 2²⁰ = 129208063 is a prime.

Together with 130256641, it forms a pair of twin primes.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 130256599 and 130256608.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (130256939) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 65128319 + 65128320.

It is an arithmetic number, because the mean of its divisors is an integer number (65128320).

Almost surely, 2^130256639 is an apocalyptic number.

130256639 is a deficient number, since it is larger than the sum of its proper divisors (1).

130256639 is an equidigital number, since it uses as much as digits as its factorization.

130256639 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 29160, while the sum is 35.

The square root of 130256639 is about 11413.0030666779. The cubic root of 130256639 is about 506.9128369105.

The spelling of 130256639 in words is "one hundred thirty million, two hundred fifty-six thousand, six hundred thirty-nine".