343440731 has 2 divisors, whose sum is σ = 343440732. Its totient is φ = 343440730.

The previous prime is 343440667. The next prime is 343440733. The reversal of 343440731 is 137044343.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 343440731 - 2⁶ = 343440667 is a prime.

It is a super-2 number, since 2×343440731² = 235903071419628722, which contains 22 as substring.

Together with 343440733, it forms a pair of twin primes.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 343440694 and 343440703.

It is not a weakly prime, because it can be changed into another prime (343440733) 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, 171720365 + 171720366.

It is an arithmetic number, because the mean of its divisors is an integer number (171720366).

Almost surely, 2^343440731 is an apocalyptic number.

343440731 is a deficient number, since it is larger than the sum of its proper divisors (1).

343440731 is an equidigital number, since it uses as much as digits as its factorization.

343440731 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 12096, while the sum is 29.

The square root of 343440731 is about 18532.1539762651. The cubic root of 343440731 is about 700.2996886838.

The spelling of 343440731 in words is "three hundred forty-three million, four hundred forty thousand, seven hundred thirty-one".