31031009129 has 2 divisors, whose sum is σ = 31031009130. Its totient is φ = 31031009128.

The previous prime is 31031009123. The next prime is 31031009137. The reversal of 31031009129 is 92190013013.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 31030584025 + 425104 = 176155^2 + 652^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-31031009129 is a prime.

It is not a weakly prime, because it can be changed into another prime (31031009123) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15515504564 + 15515504565.

It is an arithmetic number, because the mean of its divisors is an integer number (15515504565).

Almost surely, 2^31031009129 is an apocalyptic number.

It is an amenable number.

31031009129 is a deficient number, since it is larger than the sum of its proper divisors (1).

31031009129 is an equidigital number, since it uses as much as digits as its factorization.

31031009129 is an evil number, because the sum of its binary digits is even.

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

The spelling of 31031009129 in words is "thirty-one billion, thirty-one million, nine thousand, one hundred twenty-nine".