129361919 has 2 divisors, whose sum is σ = 129361920. Its totient is φ = 129361918.

The previous prime is 129361909. The next prime is 129361927. The reversal of 129361919 is 919163921.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-129361919 is a prime.

It is a super-2 number, since 2×129361919² = 33469012174725122, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (129361909) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 64680959 + 64680960.

It is an arithmetic number, because the mean of its divisors is an integer number (64680960).

Almost surely, 2^129361919 is an apocalyptic number.

129361919 is a deficient number, since it is larger than the sum of its proper divisors (1).

129361919 is an equidigital number, since it uses as much as digits as its factorization.

129361919 is an evil number, because the sum of its binary digits is even.

The product of its digits is 26244, while the sum is 41.

The square root of 129361919 is about 11373.7381278100. The cubic root of 129361919 is about 505.7495245193.

The spelling of 129361919 in words is "one hundred twenty-nine million, three hundred sixty-one thousand, nine hundred nineteen".