31742867549 has 2 divisors, whose sum is σ = 31742867550. Its totient is φ = 31742867548.

The previous prime is 31742867461. The next prime is 31742867561. The reversal of 31742867549 is 94576824713.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 26892720100 + 4850147449 = 163990^2 + 69643^2 .

It is a cyclic number.

It is not a de Polignac number, because 31742867549 - 2²⁰ = 31741818973 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 31742867494 and 31742867503.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (31742867599) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15871433774 + 15871433775.

It is an arithmetic number, because the mean of its divisors is an integer number (15871433775).

Almost surely, 2^31742867549 is an apocalyptic number.

It is an amenable number.

31742867549 is a deficient number, since it is larger than the sum of its proper divisors (1).

31742867549 is an equidigital number, since it uses as much as digits as its factorization.

31742867549 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 10160640, while the sum is 56.

The spelling of 31742867549 in words is "thirty-one billion, seven hundred forty-two million, eight hundred sixty-seven thousand, five hundred forty-nine".