31875959749 has 2 divisors, whose sum is σ = 31875959750. Its totient is φ = 31875959748.

The previous prime is 31875959741. The next prime is 31875959879. The reversal of 31875959749 is 94795957813.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 22415479524 + 9460480225 = 149718^2 + 97265^2 .

It is a cyclic number.

It is not a de Polignac number, because 31875959749 - 2³ = 31875959741 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (31875959741) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15937979874 + 15937979875.

It is an arithmetic number, because the mean of its divisors is an integer number (15937979875).

Almost surely, 2^31875959749 is an apocalyptic number.

It is an amenable number.

31875959749 is a deficient number, since it is larger than the sum of its proper divisors (1).

31875959749 is an equidigital number, since it uses as much as digits as its factorization.

31875959749 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 85730400, while the sum is 67.

The spelling of 31875959749 in words is "thirty-one billion, eight hundred seventy-five million, nine hundred fifty-nine thousand, seven hundred forty-nine".