345643989 has 8 divisors (see below), whose sum is σ = 461003232. Its totient is φ = 230357040.

The previous prime is 345643943. The next prime is 345643993. The reversal of 345643989 is 989346543.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 345643989 - 2⁸ = 345643733 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (345643939) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5707 + ... + 26904.

It is an arithmetic number, because the mean of its divisors is an integer number (57625404).

Almost surely, 2^345643989 is an apocalyptic number.

It is an amenable number.

345643989 is a deficient number, since it is larger than the sum of its proper divisors (115359243).

345643989 is a wasteful number, since it uses less digits than its factorization.

345643989 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36147.

The product of its digits is 2799360, while the sum is 51.

The square root of 345643989 is about 18591.5031398755. The cubic root of 345643989 is about 701.7940301247.

The spelling of 345643989 in words is "three hundred forty-five million, six hundred forty-three thousand, nine hundred eighty-nine".