129465431 has 2 divisors, whose sum is σ = 129465432. Its totient is φ = 129465430.

The previous prime is 129465409. The next prime is 129465439. The reversal of 129465431 is 134564921.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 129465431 - 2²² = 125271127 is a prime.

It is a super-2 number, since 2×129465431² = 33522595648031522, 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 = 129465391 and 129465400.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (129465439) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 64732715 + 64732716.

It is an arithmetic number, because the mean of its divisors is an integer number (64732716).

Almost surely, 2^129465431 is an apocalyptic number.

129465431 is a deficient number, since it is larger than the sum of its proper divisors (1).

129465431 is an equidigital number, since it uses as much as digits as its factorization.

129465431 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 25920, while the sum is 35.

The square root of 129465431 is about 11378.2877007044. The cubic root of 129465431 is about 505.8843843711.

The spelling of 129465431 in words is "one hundred twenty-nine million, four hundred sixty-five thousand, four hundred thirty-one".