345945857 has 4 divisors (see below), whose sum is σ = 351109296. Its totient is φ = 340782420.

The previous prime is 345945827. The next prime is 345945877. The reversal of 345945857 is 758549543.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 758549543 = 37 ⋅20501339.

It is a cyclic number.

It is not a de Polignac number, because 345945857 - 2²⁶ = 278836993 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (345945827) 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, 2581619 + ... + 2581752.

It is an arithmetic number, because the mean of its divisors is an integer number (87777324).

Almost surely, 2^345945857 is an apocalyptic number.

It is an amenable number.

345945857 is a deficient number, since it is larger than the sum of its proper divisors (5163439).

345945857 is an equidigital number, since it uses as much as digits as its factorization.

345945857 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5163438.

The product of its digits is 3024000, while the sum is 50.

The square root of 345945857 is about 18599.6198079423. The cubic root of 345945857 is about 701.9982744957.

The spelling of 345945857 in words is "three hundred forty-five million, nine hundred forty-five thousand, eight hundred fifty-seven".