680237917 has 4 divisors (see below), whose sum is σ = 682033120. Its totient is φ = 678442716.

The previous prime is 680237911. The next prime is 680237951. The reversal of 680237917 is 719732086.

It is a happy number.

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: 719732086 = 2 ⋅359866043.

It is a cyclic number.

It is not a de Polignac number, because 680237917 - 2¹¹ = 680235869 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 (680237911) 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, 897033 + ... + 897790.

It is an arithmetic number, because the mean of its divisors is an integer number (170508280).

Almost surely, 2^680237917 is an apocalyptic number.

It is an amenable number.

680237917 is a deficient number, since it is larger than the sum of its proper divisors (1795203).

680237917 is a wasteful number, since it uses less digits than its factorization.

680237917 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1795202.

The product of its (nonzero) digits is 127008, while the sum is 43.

The square root of 680237917 is about 26081.3710720890. The cubic root of 680237917 is about 879.4684793874.

The spelling of 680237917 in words is "six hundred eighty million, two hundred thirty-seven thousand, nine hundred seventeen".