129401650597 has 2 divisors, whose sum is σ = 129401650598. Its totient is φ = 129401650596.

The previous prime is 129401650541. The next prime is 129401650621. The reversal of 129401650597 is 795056104921.

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., 123565607361 + 5836043236 = 351519^2 + 76394^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-129401650597 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 129401650597.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (129401650507) 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, 64700825298 + 64700825299.

It is an arithmetic number, because the mean of its divisors is an integer number (64700825299).

Almost surely, 2^129401650597 is an apocalyptic number.

It is an amenable number.

129401650597 is a deficient number, since it is larger than the sum of its proper divisors (1).

129401650597 is an equidigital number, since it uses as much as digits as its factorization.

129401650597 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 680400, while the sum is 49.

The spelling of 129401650597 in words is "one hundred twenty-nine billion, four hundred one million, six hundred fifty thousand, five hundred ninety-seven".