129193031 has 6 divisors (see below), whose sum is σ = 142005696. Its totient is φ = 117448100.

The previous prime is 129193021. The next prime is 129193049. The reversal of 129193031 is 130391921.

It is not a de Polignac number, because 129193031 - 2¹⁸ = 128930887 is a prime.

It is a super-2 number, since 2×129193031² = 33381678517933922, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 129192985 and 129193003.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (129193021) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 533735 + ... + 533976.

It is an arithmetic number, because the mean of its divisors is an integer number (23667616).

Almost surely, 2^129193031 is an apocalyptic number.

129193031 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

129193031 is a deficient number, since it is larger than the sum of its proper divisors (12812665).

129193031 is a wasteful number, since it uses less digits than its factorization.

129193031 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1067733 (or 1067722 counting only the distinct ones).

The product of its (nonzero) digits is 1458, while the sum is 29.

The square root of 129193031 is about 11366.3112310019. The cubic root of 129193031 is about 505.5293354960.

The spelling of 129193031 in words is "one hundred twenty-nine million, one hundred ninety-three thousand, thirty-one".