31189709029 has 2 divisors, whose sum is σ = 31189709030. Its totient is φ = 31189709028.

The previous prime is 31189709021. The next prime is 31189709063. The reversal of 31189709029 is 92090798113.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 22962856225 + 8226852804 = 151535^2 + 90702^2 .

It is an emirp because it is prime and its reverse (92090798113) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 31189709029 - 2³ = 31189709021 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (31189709021) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15594854514 + 15594854515.

It is an arithmetic number, because the mean of its divisors is an integer number (15594854515).

Almost surely, 2^31189709029 is an apocalyptic number.

It is an amenable number.

31189709029 is a deficient number, since it is larger than the sum of its proper divisors (1).

31189709029 is an equidigital number, since it uses as much as digits as its factorization.

31189709029 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 244944, while the sum is 49.

The spelling of 31189709029 in words is "thirty-one billion, one hundred eighty-nine million, seven hundred nine thousand, twenty-nine".