346420391 has 4 divisors (see below), whose sum is σ = 346519632. Its totient is φ = 346321152.

The previous prime is 346420379. The next prime is 346420397. The reversal of 346420391 is 193024643.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-346420391 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 (346420397) 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, 44186 + ... + 51431.

It is an arithmetic number, because the mean of its divisors is an integer number (86629908).

Almost surely, 2^346420391 is an apocalyptic number.

346420391 is a deficient number, since it is larger than the sum of its proper divisors (99241).

346420391 is an equidigital number, since it uses as much as digits as its factorization.

346420391 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 99240.

The product of its (nonzero) digits is 15552, while the sum is 32.

The square root of 346420391 is about 18612.3719874711. The cubic root of 346420391 is about 702.3191049030.

The spelling of 346420391 in words is "three hundred forty-six million, four hundred twenty thousand, three hundred ninety-one".