345172417 has 4 divisors (see below), whose sum is σ = 345209776. Its totient is φ = 345135060.

The previous prime is 345172337. The next prime is 345172423. The reversal of 345172417 is 714271543.

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 a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 714271543 = 18439 ⋅38737.

It is a cyclic number.

It is not a de Polignac number, because 345172417 - 2¹¹ = 345170369 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (345172447) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6442 + ... + 27052.

It is an arithmetic number, because the mean of its divisors is an integer number (86302444).

Almost surely, 2^345172417 is an apocalyptic number.

It is an amenable number.

345172417 is a deficient number, since it is larger than the sum of its proper divisors (37359).

345172417 is a wasteful number, since it uses less digits than its factorization.

345172417 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 37358.

The product of its digits is 23520, while the sum is 34.

The square root of 345172417 is about 18578.8163508874. The cubic root of 345172417 is about 701.4747256325.

The spelling of 345172417 in words is "three hundred forty-five million, one hundred seventy-two thousand, four hundred seventeen".