717940343 has 4 divisors (see below), whose sum is σ = 718433880. Its totient is φ = 717446808.

The previous prime is 717940339. The next prime is 717940351. The reversal of 717940343 is 343049717.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 343049717 = 6229 ⋅55073.

It is a cyclic number.

It is not a de Polignac number, because 717940343 - 2² = 717940339 is a prime.

It is a super-2 number, since 2×717940343² = 1030876672213915298, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 717940297 and 717940306.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (717940303) 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, 244580 + ... + 247497.

It is an arithmetic number, because the mean of its divisors is an integer number (179608470).

Almost surely, 2^717940343 is an apocalyptic number.

717940343 is a deficient number, since it is larger than the sum of its proper divisors (493537).

717940343 is a wasteful number, since it uses less digits than its factorization.

717940343 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 493536.

The product of its (nonzero) digits is 63504, while the sum is 38.

The square root of 717940343 is about 26794.4088010913. The cubic root of 717940343 is about 895.4254889374.

The spelling of 717940343 in words is "seven hundred seventeen million, nine hundred forty thousand, three hundred forty-three".