31308949374487 has 2 divisors, whose sum is σ = 31308949374488. Its totient is φ = 31308949374486.

The previous prime is 31308949374413. The next prime is 31308949374533. The reversal of 31308949374487 is 78447394980313.

It is a happy number.

It is a strong prime.

It is an emirp because it is prime and its reverse (78447394980313) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 31308949374487 - 2⁴³ = 22512856352279 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (31308949377487) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15654474687243 + 15654474687244.

It is an arithmetic number, because the mean of its divisors is an integer number (15654474687244).

Almost surely, 2^{31308949374487} is an apocalyptic number.

31308949374487 is a deficient number, since it is larger than the sum of its proper divisors (1).

31308949374487 is an equidigital number, since it uses as much as digits as its factorization.

31308949374487 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 438939648, while the sum is 70.

The spelling of 31308949374487 in words is "thirty-one trillion, three hundred eight billion, nine hundred forty-nine million, three hundred seventy-four thousand, four hundred eighty-seven".