31107708949 has 2 divisors, whose sum is σ = 31107708950. Its totient is φ = 31107708948.

The previous prime is 31107708923. The next prime is 31107708971. The reversal of 31107708949 is 94980770113.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 16897400100 + 14210308849 = 129990^2 + 119207^2 .

It is an emirp because it is prime and its reverse (94980770113) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 31107708949 - 2¹¹ = 31107706901 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (31107718949) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15553854474 + 15553854475.

It is an arithmetic number, because the mean of its divisors is an integer number (15553854475).

Almost surely, 2^31107708949 is an apocalyptic number.

It is an amenable number.

31107708949 is a deficient number, since it is larger than the sum of its proper divisors (1).

31107708949 is an equidigital number, since it uses as much as digits as its factorization.

31107708949 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 381024, while the sum is 49.

The spelling of 31107708949 in words is "thirty-one billion, one hundred seven million, seven hundred eight thousand, nine hundred forty-nine".