345405917 has 4 divisors (see below), whose sum is σ = 345497376. Its totient is φ = 345314460.

The previous prime is 345405913. The next prime is 345405923. The reversal of 345405917 is 719504543.

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: 719504543 = 103 ⋅6985481.

It is a cyclic number.

It is not a de Polignac number, because 345405917 - 2² = 345405913 is a prime.

It is a super-2 number, since 2×345405917² = 238610494997221778, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (345405913) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 39809 + ... + 47702.

It is an arithmetic number, because the mean of its divisors is an integer number (86374344).

Almost surely, 2^345405917 is an apocalyptic number.

It is an amenable number.

345405917 is a deficient number, since it is larger than the sum of its proper divisors (91459).

345405917 is an equidigital number, since it uses as much as digits as its factorization.

345405917 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 91458.

The product of its (nonzero) digits is 75600, while the sum is 38.

The square root of 345405917 is about 18585.0993271492. The cubic root of 345405917 is about 701.6328663375.

The spelling of 345405917 in words is "three hundred forty-five million, four hundred five thousand, nine hundred seventeen".