31046847761309 has 2 divisors, whose sum is σ = 31046847761310. Its totient is φ = 31046847761308.

The previous prime is 31046847761221. The next prime is 31046847761311. The reversal of 31046847761309 is 90316774864013.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 25922577982084 + 5124269779225 = 5091422^2 + 2263685^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-31046847761309 is a prime.

Together with 31046847761311, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (31046847761009) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15523423880654 + 15523423880655.

It is an arithmetic number, because the mean of its divisors is an integer number (15523423880655).

Almost surely, 2^{31046847761309} is an apocalyptic number.

It is an amenable number.

31046847761309 is a deficient number, since it is larger than the sum of its proper divisors (1).

31046847761309 is an equidigital number, since it uses as much as digits as its factorization.

31046847761309 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 18289152, while the sum is 59.

The spelling of 31046847761309 in words is "thirty-one trillion, forty-six billion, eight hundred forty-seven million, seven hundred sixty-one thousand, three hundred nine".