129994937819 has 2 divisors, whose sum is σ = 129994937820. Its totient is φ = 129994937818.

The previous prime is 129994937777. The next prime is 129994937873. The reversal of 129994937819 is 918739499921.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 129994937819 - 2¹⁶ = 129994872283 is a prime.

It is a super-2 number, since 2×129994937819² (a number of 23 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (129994937899) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 64997468909 + 64997468910.

It is an arithmetic number, because the mean of its divisors is an integer number (64997468910).

Almost surely, 2^129994937819 is an apocalyptic number.

129994937819 is a deficient number, since it is larger than the sum of its proper divisors (1).

129994937819 is an equidigital number, since it uses as much as digits as its factorization.

129994937819 is an evil number, because the sum of its binary digits is even.

The product of its digits is 79361856, while the sum is 71.

The spelling of 129994937819 in words is "one hundred twenty-nine billion, nine hundred ninety-four million, nine hundred thirty-seven thousand, eight hundred nineteen".