129696361 has 2 divisors, whose sum is σ = 129696362. Its totient is φ = 129696360.

The previous prime is 129696311. The next prime is 129696373. The reversal of 129696361 is 163696921.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 128686336 + 1010025 = 11344^2 + 1005^2 .

It is a cyclic number.

It is not a de Polignac number, because 129696361 - 2²¹ = 127599209 is a prime.

It is a super-2 number, since 2×129696361² = 33642292113284642, which contains 22 as substring.

It is an alternating number because its digits alternate between odd and even.

It is not a weakly prime, because it can be changed into another prime (129696311) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 64848180 + 64848181.

It is an arithmetic number, because the mean of its divisors is an integer number (64848181).

Almost surely, 2^129696361 is an apocalyptic number.

It is an amenable number.

129696361 is a deficient number, since it is larger than the sum of its proper divisors (1).

129696361 is an equidigital number, since it uses as much as digits as its factorization.

129696361 is an evil number, because the sum of its binary digits is even.

The product of its digits is 104976, while the sum is 43.

The square root of 129696361 is about 11388.4310157282. The cubic root of 129696361 is about 506.1849909716.

The spelling of 129696361 in words is "one hundred twenty-nine million, six hundred ninety-six thousand, three hundred sixty-one".