31400000389 has 2 divisors, whose sum is σ = 31400000390. Its totient is φ = 31400000388.

The previous prime is 31400000369. The next prime is 31400000413. The reversal of 31400000389 is 98300000413.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 23337756289 + 8062244100 = 152767^2 + 89790^2 .

It is a cyclic number.

It is not a de Polignac number, because 31400000389 - 2⁹ = 31399999877 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (31400000369) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15700000194 + 15700000195.

It is an arithmetic number, because the mean of its divisors is an integer number (15700000195).

Almost surely, 2^31400000389 is an apocalyptic number.

It is an amenable number.

31400000389 is a deficient number, since it is larger than the sum of its proper divisors (1).

31400000389 is an equidigital number, since it uses as much as digits as its factorization.

31400000389 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2592, while the sum is 28.

The spelling of 31400000389 in words is "thirty-one billion, four hundred million, three hundred eighty-nine", and thus it is an aban number.