343840139 has 2 divisors, whose sum is σ = 343840140. Its totient is φ = 343840138.

The previous prime is 343840111. The next prime is 343840177. The reversal of 343840139 is 931048343.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 343840139 - 2¹² = 343836043 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 343840099 and 343840108.

It is not a weakly prime, because it can be changed into another prime (343840039) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 171920069 + 171920070.

It is an arithmetic number, because the mean of its divisors is an integer number (171920070).

Almost surely, 2^343840139 is an apocalyptic number.

343840139 is a deficient number, since it is larger than the sum of its proper divisors (1).

343840139 is an equidigital number, since it uses as much as digits as its factorization.

343840139 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 31104, while the sum is 35.

The square root of 343840139 is about 18542.9269264590. The cubic root of 343840139 is about 700.5710571365.

The spelling of 343840139 in words is "three hundred forty-three million, eight hundred forty thousand, one hundred thirty-nine".