345656779 has 4 divisors (see below), whose sum is σ = 372245776. Its totient is φ = 319067784.

The previous prime is 345656749. The next prime is 345656783. The reversal of 345656779 is 977656543.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 977656543 = 307 ⋅3184549.

It is a cyclic number.

It is not a de Polignac number, because 345656779 - 2¹⁷ = 345525707 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (345656749) 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, 13294479 + ... + 13294504.

It is an arithmetic number, because the mean of its divisors is an integer number (93061444).

Almost surely, 2^345656779 is an apocalyptic number.

345656779 is a deficient number, since it is larger than the sum of its proper divisors (26588997).

345656779 is a wasteful number, since it uses less digits than its factorization.

345656779 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26588996.

The product of its digits is 4762800, while the sum is 52.

The square root of 345656779 is about 18591.8471110323. The cubic root of 345656779 is about 701.8026862711.

The spelling of 345656779 in words is "three hundred forty-five million, six hundred fifty-six thousand, seven hundred seventy-nine".