129231373 has 2 divisors, whose sum is σ = 129231374. Its totient is φ = 129231372.

The previous prime is 129231359. The next prime is 129231391. The reversal of 129231373 is 373132921.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 66536649 + 62694724 = 8157^2 + 7918^2 .

It is a cyclic number.

It is not a de Polignac number, because 129231373 - 2¹³ = 129223181 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (129231313) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 64615686 + 64615687.

It is an arithmetic number, because the mean of its divisors is an integer number (64615687).

Almost surely, 2^129231373 is an apocalyptic number.

It is an amenable number.

129231373 is a deficient number, since it is larger than the sum of its proper divisors (1).

129231373 is an equidigital number, since it uses as much as digits as its factorization.

129231373 is an evil number, because the sum of its binary digits is even.

The product of its digits is 6804, while the sum is 31.

The square root of 129231373 is about 11367.9977568611. The cubic root of 129231373 is about 505.5793410019.

The spelling of 129231373 in words is "one hundred twenty-nine million, two hundred thirty-one thousand, three hundred seventy-three".