683747387 has 4 divisors (see below), whose sum is σ = 684438336. Its totient is φ = 683056440.

The previous prime is 683747369. The next prime is 683747417. The reversal of 683747387 is 783747386.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 683747387 - 2⁸ = 683747131 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (683747287) 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, 343988 + ... + 345969.

It is an arithmetic number, because the mean of its divisors is an integer number (171109584).

Almost surely, 2^683747387 is an apocalyptic number.

683747387 is a deficient number, since it is larger than the sum of its proper divisors (690949).

683747387 is an equidigital number, since it uses as much as digits as its factorization.

683747387 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 690948.

The product of its digits is 4741632, while the sum is 53.

The square root of 683747387 is about 26148.5637655302. The cubic root of 683747387 is about 880.9783312822.

Subtracting 683747387 from its reverse (783747386), we obtain a palindrome (99999999).

The spelling of 683747387 in words is "six hundred eighty-three million, seven hundred forty-seven thousand, three hundred eighty-seven".