331673129 has 2 divisors, whose sum is σ = 331673130. Its totient is φ = 331673128.

The previous prime is 331673107. The next prime is 331673131. The reversal of 331673129 is 921376133.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 265690000 + 65983129 = 16300^2 + 8123^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-331673129 is a prime.

It is a super-2 number, since 2×331673129² = 220014129001301282, which contains 22 as substring.

Together with 331673131, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (331673159) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 165836564 + 165836565.

It is an arithmetic number, because the mean of its divisors is an integer number (165836565).

Almost surely, 2^331673129 is an apocalyptic number.

It is an amenable number.

331673129 is a deficient number, since it is larger than the sum of its proper divisors (1).

331673129 is an equidigital number, since it uses as much as digits as its factorization.

331673129 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 20412, while the sum is 35.

The square root of 331673129 is about 18211.8952610650. The cubic root of 331673129 is about 692.2082365560.

The spelling of 331673129 in words is "three hundred thirty-one million, six hundred seventy-three thousand, one hundred twenty-nine".