345398057 has 4 divisors (see below), whose sum is σ = 345584340. Its totient is φ = 345211776.

The previous prime is 345398047. The next prime is 345398077. The reversal of 345398057 is 750893543.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 750893543 = 8191 ⋅91673.

It can be written as a sum of positive squares in 2 ways, for example, as 172764736 + 172633321 = 13144^2 + 13139^2 .

It is a cyclic number.

It is not a de Polignac number, because 345398057 - 2¹⁶ = 345332521 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 345397999 and 345398017.

It is not an unprimeable number, because it can be changed into a prime (345398047) 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, 90332 + ... + 94077.

It is an arithmetic number, because the mean of its divisors is an integer number (86396085).

Almost surely, 2^345398057 is an apocalyptic number.

It is an amenable number.

345398057 is a deficient number, since it is larger than the sum of its proper divisors (186283).

345398057 is a wasteful number, since it uses less digits than its factorization.

345398057 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 186282.

The product of its (nonzero) digits is 453600, while the sum is 44.

The square root of 345398057 is about 18584.8878662208. The cubic root of 345398057 is about 701.6275442166.

The spelling of 345398057 in words is "three hundred forty-five million, three hundred ninety-eight thousand, fifty-seven".