340338989 has 2 divisors, whose sum is σ = 340338990. Its totient is φ = 340338988.

The previous prime is 340338967. The next prime is 340339003. The reversal of 340338989 is 989833043.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 197177764 + 143161225 = 14042^2 + 11965^2 .

It is an emirp because it is prime and its reverse (989833043) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-340338989 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (340338919) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 170169494 + 170169495.

It is an arithmetic number, because the mean of its divisors is an integer number (170169495).

Almost surely, 2^340338989 is an apocalyptic number.

It is an amenable number.

340338989 is a deficient number, since it is larger than the sum of its proper divisors (1).

340338989 is an equidigital number, since it uses as much as digits as its factorization.

340338989 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 559872, while the sum is 47.

The square root of 340338989 is about 18448.2787543987. The cubic root of 340338989 is about 698.1850869172.

The spelling of 340338989 in words is "three hundred forty million, three hundred thirty-eight thousand, nine hundred eighty-nine".