345616857 has 6 divisors (see below), whose sum is σ = 499224362. Its totient is φ = 230411232.

The previous prime is 345616847. The next prime is 345616871. The reversal of 345616857 is 758616543.

345616857 is a `hidden beast` number, since 3 + 4 + 561 + 6 + 85 + 7 = 666.

It can be written as a sum of positive squares in only one way, i.e., 345067776 + 549081 = 18576^2 + 741^2 .

It is not a de Polignac number, because 345616857 - 2⁷ = 345616729 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (345616847) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 19200928 + ... + 19200945.

Almost surely, 2^345616857 is an apocalyptic number.

It is an amenable number.

345616857 is a deficient number, since it is larger than the sum of its proper divisors (153607505).

345616857 is a wasteful number, since it uses less digits than its factorization.

345616857 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 38401879 (or 38401876 counting only the distinct ones).

The product of its digits is 604800, while the sum is 45.

The square root of 345616857 is about 18590.7734373802. The cubic root of 345616857 is about 701.7756667465.

The spelling of 345616857 in words is "three hundred forty-five million, six hundred sixteen thousand, eight hundred fifty-seven".