31340004389 has 2 divisors, whose sum is σ = 31340004390. Its totient is φ = 31340004388.

The previous prime is 31340004313. The next prime is 31340004419. The reversal of 31340004389 is 98340004313.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 30159532225 + 1180472164 = 173665^2 + 34358^2 .

It is a cyclic number.

It is not a de Polignac number, because 31340004389 - 2⁸ = 31340004133 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (31340004989) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15670002194 + 15670002195.

It is an arithmetic number, because the mean of its divisors is an integer number (15670002195).

Almost surely, 2^31340004389 is an apocalyptic number.

It is an amenable number.

31340004389 is a deficient number, since it is larger than the sum of its proper divisors (1).

31340004389 is an equidigital number, since it uses as much as digits as its factorization.

31340004389 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 31104, while the sum is 35.

The spelling of 31340004389 in words is "thirty-one billion, three hundred forty million, four thousand, three hundred eighty-nine".