339978689 has 2 divisors, whose sum is σ = 339978690. Its totient is φ = 339978688.

The previous prime is 339978679. The next prime is 339978701. The reversal of 339978689 is 986879933.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 324612289 + 15366400 = 18017^2 + 3920^2 .

It is a cyclic number.

It is not a de Polignac number, because 339978689 - 2²⁸ = 71543233 is a prime.

It is not a weakly prime, because it can be changed into another prime (339978659) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 169989344 + 169989345.

It is an arithmetic number, because the mean of its divisors is an integer number (169989345).

Almost surely, 2^339978689 is an apocalyptic number.

It is an amenable number.

339978689 is a deficient number, since it is larger than the sum of its proper divisors (1).

339978689 is an equidigital number, since it uses as much as digits as its factorization.

339978689 is an evil number, because the sum of its binary digits is even.

The product of its digits is 17635968, while the sum is 62.

The square root of 339978689 is about 18438.5110299069. The cubic root of 339978689 is about 697.9386219541.

The spelling of 339978689 in words is "three hundred thirty-nine million, nine hundred seventy-eight thousand, six hundred eighty-nine".