31042343389 has 2 divisors, whose sum is σ = 31042343390. Its totient is φ = 31042343388.

The previous prime is 31042343347. The next prime is 31042343401. The reversal of 31042343389 is 98334324013.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 25894280889 + 5148062500 = 160917^2 + 71750^2 .

It is a cyclic number.

It is not a de Polignac number, because 31042343389 - 2²³ = 31033954781 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (31042343309) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15521171694 + 15521171695.

It is an arithmetic number, because the mean of its divisors is an integer number (15521171695).

Almost surely, 2^31042343389 is an apocalyptic number.

It is an amenable number.

31042343389 is a deficient number, since it is larger than the sum of its proper divisors (1).

31042343389 is an equidigital number, since it uses as much as digits as its factorization.

31042343389 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 186624, while the sum is 40.

The spelling of 31042343389 in words is "thirty-one billion, forty-two million, three hundred forty-three thousand, three hundred eighty-nine".