340031389 has 2 divisors, whose sum is σ = 340031390. Its totient is φ = 340031388.

The previous prime is 340031381. The next prime is 340031407. The reversal of 340031389 is 983130043.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 192044164 + 147987225 = 13858^2 + 12165^2 .

It is a cyclic number.

It is not a de Polignac number, because 340031389 - 2³ = 340031381 is a prime.

It is a plaindrome in base 16.

It is a self number, because there is not a number n which added to its sum of digits gives 340031389.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (340031381) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 170015694 + 170015695.

It is an arithmetic number, because the mean of its divisors is an integer number (170015695).

Almost surely, 2^340031389 is an apocalyptic number.

It is an amenable number.

340031389 is a deficient number, since it is larger than the sum of its proper divisors (1).

340031389 is an equidigital number, since it uses as much as digits as its factorization.

340031389 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 7776, while the sum is 31.

The square root of 340031389 is about 18439.9400487095. The cubic root of 340031389 is about 697.9746825134.

The spelling of 340031389 in words is "three hundred forty million, thirty-one thousand, three hundred eighty-nine".