129760231 has 2 divisors, whose sum is σ = 129760232. Its totient is φ = 129760230.

The previous prime is 129760219. The next prime is 129760259. The reversal of 129760231 is 132067921.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 129760231 - 2⁹ = 129759719 is a prime.

It is a super-2 number, since 2×129760231² = 33675435098346722, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 129760193 and 129760202.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (129760261) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 64880115 + 64880116.

It is an arithmetic number, because the mean of its divisors is an integer number (64880116).

Almost surely, 2^129760231 is an apocalyptic number.

129760231 is a deficient number, since it is larger than the sum of its proper divisors (1).

129760231 is an equidigital number, since it uses as much as digits as its factorization.

129760231 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4536, while the sum is 31.

The square root of 129760231 is about 11391.2348320979. The cubic root of 129760231 is about 506.2680689380.

The spelling of 129760231 in words is "one hundred twenty-nine million, seven hundred sixty thousand, two hundred thirty-one".