688373417 has 6 divisors (see below), whose sum is σ = 719604522. Its totient is φ = 658443632.

The previous prime is 688373341. The next prime is 688373423. The reversal of 688373417 is 714373886.

It can be written as a sum of positive squares in only one way, i.e., 380406016 + 307967401 = 19504^2 + 17549^2 .

It is a de Polignac number, because none of the positive numbers 2^k-688373417 is a prime.

It is a super-2 number, since 2×688373417² = 947715922464511778, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (688373447) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 650108 + ... + 651165.

It is an arithmetic number, because the mean of its divisors is an integer number (119934087).

Almost surely, 2^688373417 is an apocalyptic number.

It is an amenable number.

688373417 is a deficient number, since it is larger than the sum of its proper divisors (31231105).

688373417 is a wasteful number, since it uses less digits than its factorization.

688373417 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1301319 (or 1301296 counting only the distinct ones).

The product of its digits is 677376, while the sum is 47.

The square root of 688373417 is about 26236.8713264368. The cubic root of 688373417 is about 882.9606791530.

The spelling of 688373417 in words is "six hundred eighty-eight million, three hundred seventy-three thousand, four hundred seventeen".