347946421 has 4 divisors (see below), whose sum is σ = 351138700. Its totient is φ = 344754144.

The previous prime is 347946413. The next prime is 347946427. The reversal of 347946421 is 124649743.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 110355025 + 237591396 = 10505^2 + 15414^2 .

It is a cyclic number.

It is not a de Polignac number, because 347946421 - 2³ = 347946413 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (347946427) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1595976 + ... + 1596193.

It is an arithmetic number, because the mean of its divisors is an integer number (87784675).

Almost surely, 2^347946421 is an apocalyptic number.

It is an amenable number.

347946421 is a deficient number, since it is larger than the sum of its proper divisors (3192279).

347946421 is a wasteful number, since it uses less digits than its factorization.

347946421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3192278.

The product of its digits is 145152, while the sum is 40.

The square root of 347946421 is about 18653.3219829606. The cubic root of 347946421 is about 703.3488654107.

The spelling of 347946421 in words is "three hundred forty-seven million, nine hundred forty-six thousand, four hundred twenty-one".