343891139 has 2 divisors, whose sum is σ = 343891140. Its totient is φ = 343891138.

The previous prime is 343891133. The next prime is 343891159. The reversal of 343891139 is 931198343.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 343891139 - 2⁴ = 343891123 is a prime.

It is a super-2 number, since 2×343891139² = 236522230965434642, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 343891096 and 343891105.

It is not a weakly prime, because it can be changed into another prime (343891133) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 171945569 + 171945570.

It is an arithmetic number, because the mean of its divisors is an integer number (171945570).

Almost surely, 2^343891139 is an apocalyptic number.

343891139 is a deficient number, since it is larger than the sum of its proper divisors (1).

343891139 is an equidigital number, since it uses as much as digits as its factorization.

343891139 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 69984, while the sum is 41.

The square root of 343891139 is about 18544.3020628979. The cubic root of 343891139 is about 700.6056927646.

The spelling of 343891139 in words is "three hundred forty-three million, eight hundred ninety-one thousand, one hundred thirty-nine".