129361399 has 2 divisors, whose sum is σ = 129361400. Its totient is φ = 129361398.

The previous prime is 129361369. The next prime is 129361423. The reversal of 129361399 is 993163921.

It is a strong prime.

It is an emirp because it is prime and its reverse (993163921) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 129361399 - 2¹⁷ = 129230327 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (129361339) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 64680699 + 64680700.

It is an arithmetic number, because the mean of its divisors is an integer number (64680700).

Almost surely, 2^129361399 is an apocalyptic number.

129361399 is a deficient number, since it is larger than the sum of its proper divisors (1).

129361399 is an equidigital number, since it uses as much as digits as its factorization.

129361399 is an evil number, because the sum of its binary digits is even.

The product of its digits is 78732, while the sum is 43.

The square root of 129361399 is about 11373.7152681083. The cubic root of 129361399 is about 505.7488468595.

The spelling of 129361399 in words is "one hundred twenty-nine million, three hundred sixty-one thousand, three hundred ninety-nine".