347743421 has 2 divisors, whose sum is σ = 347743422. Its totient is φ = 347743420.

The previous prime is 347743393. The next prime is 347743423. The reversal of 347743421 is 124347743.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 285948100 + 61795321 = 16910^2 + 7861^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-347743421 is a prime.

Together with 347743423, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (347743423) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 173871710 + 173871711.

It is an arithmetic number, because the mean of its divisors is an integer number (173871711).

Almost surely, 2^347743421 is an apocalyptic number.

It is an amenable number.

347743421 is a deficient number, since it is larger than the sum of its proper divisors (1).

347743421 is an equidigital number, since it uses as much as digits as its factorization.

347743421 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 56448, while the sum is 35.

The square root of 347743421 is about 18647.8797990549. The cubic root of 347743421 is about 703.2120554623.

The spelling of 347743421 in words is "three hundred forty-seven million, seven hundred forty-three thousand, four hundred twenty-one".