31942634873 has 2 divisors, whose sum is σ = 31942634874. Its totient is φ = 31942634872.

The previous prime is 31942634809. The next prime is 31942634879. The reversal of 31942634873 is 37843624913.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 16569610729 + 15373024144 = 128723^2 + 123988^2 .

It is an emirp because it is prime and its reverse (37843624913) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 31942634873 - 2⁶ = 31942634809 is a prime.

It is a super-2 number, since 2×31942634873² (a number of 22 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (31942634879) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15971317436 + 15971317437.

It is an arithmetic number, because the mean of its divisors is an integer number (15971317437).

Almost surely, 2^31942634873 is an apocalyptic number.

It is an amenable number.

31942634873 is a deficient number, since it is larger than the sum of its proper divisors (1).

31942634873 is an equidigital number, since it uses as much as digits as its factorization.

31942634873 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2612736, while the sum is 50.

The spelling of 31942634873 in words is "thirty-one billion, nine hundred forty-two million, six hundred thirty-four thousand, eight hundred seventy-three".