343977839 has 2 divisors, whose sum is σ = 343977840. Its totient is φ = 343977838.

The previous prime is 343977833. The next prime is 343977859. The reversal of 343977839 is 938779343.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 343977839 - 2¹² = 343973743 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (343977833) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 171988919 + 171988920.

It is an arithmetic number, because the mean of its divisors is an integer number (171988920).

Almost surely, 2^343977839 is an apocalyptic number.

343977839 is a deficient number, since it is larger than the sum of its proper divisors (1).

343977839 is an equidigital number, since it uses as much as digits as its factorization.

343977839 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3429216, while the sum is 53.

The square root of 343977839 is about 18546.6395608477. The cubic root of 343977839 is about 700.6645654743.

The spelling of 343977839 in words is "three hundred forty-three million, nine hundred seventy-seven thousand, eight hundred thirty-nine".