345221039 has 4 divisors (see below), whose sum is σ = 345696624. Its totient is φ = 344745456.

The previous prime is 345221033. The next prime is 345221059. The reversal of 345221039 is 930122543.

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-345221039 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 (345221033) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 236702 + ... + 238155.

It is an arithmetic number, because the mean of its divisors is an integer number (86424156).

Almost surely, 2^345221039 is an apocalyptic number.

345221039 is a deficient number, since it is larger than the sum of its proper divisors (475585).

345221039 is an equidigital number, since it uses as much as digits as its factorization.

345221039 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 475584.

The product of its (nonzero) digits is 6480, while the sum is 29.

The square root of 345221039 is about 18580.1248381167. The cubic root of 345221039 is about 701.5076613492.

The spelling of 345221039 in words is "three hundred forty-five million, two hundred twenty-one thousand, thirty-nine".