129799619 has 2 divisors, whose sum is σ = 129799620. Its totient is φ = 129799618.

The previous prime is 129799613. The next prime is 129799661. The reversal of 129799619 is 916997921.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 129799619 - 2⁸ = 129799363 is a prime.

It is a super-2 number, since 2×129799619² = 33695882185090322, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (129799613) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 64899809 + 64899810.

It is an arithmetic number, because the mean of its divisors is an integer number (64899810).

Almost surely, 2^129799619 is an apocalyptic number.

129799619 is a deficient number, since it is larger than the sum of its proper divisors (1).

129799619 is an equidigital number, since it uses as much as digits as its factorization.

129799619 is an evil number, because the sum of its binary digits is even.

The product of its digits is 551124, while the sum is 53.

The square root of 129799619 is about 11392.9635740662. The cubic root of 129799619 is about 506.3192887127.

The spelling of 129799619 in words is "one hundred twenty-nine million, seven hundred ninety-nine thousand, six hundred nineteen".