129802331 has 2 divisors, whose sum is σ = 129802332. Its totient is φ = 129802330.

The previous prime is 129802313. The next prime is 129802339. The reversal of 129802331 is 133208921.

Together with previous prime (129802313) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It is an emirp because it is prime and its reverse (133208921) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 129802331 - 2¹⁴ = 129785947 is a prime.

It is a super-2 number, since 2×129802331² = 33697290266067122, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 129802294 and 129802303.

It is not a weakly prime, because it can be changed into another prime (129802339) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 64901165 + 64901166.

It is an arithmetic number, because the mean of its divisors is an integer number (64901166).

Almost surely, 2^129802331 is an apocalyptic number.

129802331 is a deficient number, since it is larger than the sum of its proper divisors (1).

129802331 is an equidigital number, since it uses as much as digits as its factorization.

129802331 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2592, while the sum is 29.

The square root of 129802331 is about 11393.0825942762. The cubic root of 129802331 is about 506.3228149900.

The spelling of 129802331 in words is "one hundred twenty-nine million, eight hundred two thousand, three hundred thirty-one".