345667889 has 4 divisors (see below), whose sum is σ = 395049024. Its totient is φ = 296286756.

The previous prime is 345667871. The next prime is 345667909. The reversal of 345667889 is 988766543.

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 not a de Polignac number, because 345667889 - 2²⁰ = 344619313 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a plaindrome in base 10.

It is not an unprimeable number, because it can be changed into a prime (345663889) 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, 24690557 + ... + 24690570.

It is an arithmetic number, because the mean of its divisors is an integer number (98762256).

Almost surely, 2^345667889 is an apocalyptic number.

It is an amenable number.

345667889 is a deficient number, since it is larger than the sum of its proper divisors (49381135).

345667889 is an equidigital number, since it uses as much as digits as its factorization.

345667889 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 49381134.

The product of its digits is 8709120, while the sum is 56.

The square root of 345667889 is about 18592.1458955119. The cubic root of 345667889 is about 701.8102052367.

The spelling of 345667889 in words is "three hundred forty-five million, six hundred sixty-seven thousand, eight hundred eighty-nine".