347263421 has 2 divisors, whose sum is σ = 347263422. Its totient is φ = 347263420.

The previous prime is 347263393. The next prime is 347263459. The reversal of 347263421 is 124362743.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 347263225 + 196 = 18635^2 + 14^2 .

It is an emirp because it is prime and its reverse (124362743) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 347263421 - 2²⁶ = 280154557 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (347263121) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 173631710 + 173631711.

It is an arithmetic number, because the mean of its divisors is an integer number (173631711).

Almost surely, 2^347263421 is an apocalyptic number.

It is an amenable number.

347263421 is a deficient number, since it is larger than the sum of its proper divisors (1).

347263421 is an equidigital number, since it uses as much as digits as its factorization.

347263421 is an evil number, because the sum of its binary digits is even.

The product of its digits is 24192, while the sum is 32.

The square root of 347263421 is about 18635.0052589206. The cubic root of 347263421 is about 702.8883520347. Note that the first 3 decimals are identical.

The spelling of 347263421 in words is "three hundred forty-seven million, two hundred sixty-three thousand, four hundred twenty-one".