129751031 has 2 divisors, whose sum is σ = 129751032. Its totient is φ = 129751030.

The previous prime is 129751001. The next prime is 129751033. The reversal of 129751031 is 130157921.

It is a strong prime.

It is an emirp because it is prime and its reverse (130157921) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 129751031 - 2¹⁰ = 129750007 is a prime.

It is a super-2 number, since 2×129751031² = 33670660091125922, which contains 22 as substring.

Together with 129751033, it forms a pair of twin primes.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 129750985 and 129751003.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (129751033) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 64875515 + 64875516.

It is an arithmetic number, because the mean of its divisors is an integer number (64875516).

Almost surely, 2^129751031 is an apocalyptic number.

129751031 is a deficient number, since it is larger than the sum of its proper divisors (1).

129751031 is an equidigital number, since it uses as much as digits as its factorization.

129751031 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1890, while the sum is 29.

The square root of 129751031 is about 11390.8310056817. The cubic root of 129751031 is about 506.2561038537.

The spelling of 129751031 in words is "one hundred twenty-nine million, seven hundred fifty-one thousand, thirty-one".