345949717 has 4 divisors (see below), whose sum is σ = 345987820. Its totient is φ = 345911616.

The previous prime is 345949699. The next prime is 345949763. The reversal of 345949717 is 717949543.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 717949543 = 43 ⋅16696501.

It can be written as a sum of positive squares in 2 ways, for example, as 125753796 + 220195921 = 11214^2 + 14839^2 .

It is a cyclic number.

It is not a de Polignac number, because 345949717 - 2²³ = 337561109 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (345949217) 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, 3343 + ... + 26515.

It is an arithmetic number, because the mean of its divisors is an integer number (86496955).

Almost surely, 2^345949717 is an apocalyptic number.

It is an amenable number.

345949717 is a deficient number, since it is larger than the sum of its proper divisors (38103).

345949717 is a wasteful number, since it uses less digits than its factorization.

345949717 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38102.

The product of its digits is 952560, while the sum is 49.

The square root of 345949717 is about 18599.7235732147. The cubic root of 345949717 is about 702.0008854084. Note that the first 3 decimals are identical.

The spelling of 345949717 in words is "three hundred forty-five million, nine hundred forty-nine thousand, seven hundred seventeen".