346827989 has 4 divisors (see below), whose sum is σ = 346878624. Its totient is φ = 346777356.

The previous prime is 346827961. The next prime is 346828021. The reversal of 346827989 is 989728643.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-346827989 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 (346827289) 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, 13067 + ... + 29400.

It is an arithmetic number, because the mean of its divisors is an integer number (86719656).

Almost surely, 2^346827989 is an apocalyptic number.

It is an amenable number.

346827989 is a deficient number, since it is larger than the sum of its proper divisors (50635).

346827989 is an equidigital number, since it uses as much as digits as its factorization.

346827989 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 50634.

The product of its digits is 5225472, while the sum is 56.

The square root of 346827989 is about 18623.3184207326. The cubic root of 346827989 is about 702.5944463385.

The spelling of 346827989 in words is "three hundred forty-six million, eight hundred twenty-seven thousand, nine hundred eighty-nine".