345072717 has 40 divisors (see below), whose sum is σ = 565025472. Its totient is φ = 208137600.

The previous prime is 345072683. The next prime is 345072743. The reversal of 345072717 is 717270543.

It is not a de Polignac number, because 345072717 - 2¹¹ = 345070669 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (345072757) by changing a digit.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 213928 + ... + 215534.

Almost surely, 2^345072717 is an apocalyptic number.

It is an amenable number.

345072717 is a deficient number, since it is larger than the sum of its proper divisors (219952755).

345072717 is a wasteful number, since it uses less digits than its factorization.

345072717 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1871 (or 1862 counting only the distinct ones).

The product of its (nonzero) digits is 41160, while the sum is 36.

The square root of 345072717 is about 18576.1329937100. The cubic root of 345072717 is about 701.4071808719.

It can be divided in two parts, 34507271 and 7, that added together give a triangular number (34507278 = T₈₃₀₇).

The spelling of 345072717 in words is "three hundred forty-five million, seventy-two thousand, seven hundred seventeen".