345656789 has 8 divisors (see below), whose sum is σ = 359620608. Its totient is φ = 331868880.

The previous prime is 345656783. The next prime is 345656809. The reversal of 345656789 is 987656543.

345656789 is an esthetic number in base 10, because in such base its adjacent digits differ by 1.

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

It is a cyclic number.

It is not a de Polignac number, because 345656789 - 2²⁰ = 344608213 is a prime.

It is an alternating number because its digits alternate between odd and even.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 345656789.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (345656783) 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, 39962 + ... + 47835.

It is an arithmetic number, because the mean of its divisors is an integer number (44952576).

Almost surely, 2^345656789 is an apocalyptic number.

It is an amenable number.

345656789 is a deficient number, since it is larger than the sum of its proper divisors (13963819).

345656789 is a wasteful number, since it uses less digits than its factorization.

345656789 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 87955.

The product of its digits is 5443200, while the sum is 53.

The square root of 345656789 is about 18591.8473799674. The cubic root of 345656789 is about 701.8026930389.

The spelling of 345656789 in words is "three hundred forty-five million, six hundred fifty-six thousand, seven hundred eighty-nine".