679943523 has 16 divisors (see below), whose sum is σ = 1036653056. Its totient is φ = 388333440.

The previous prime is 679943513. The next prime is 679943531. The reversal of 679943523 is 325349976.

It is a happy number.

It is not a de Polignac number, because 679943523 - 2⁴ = 679943507 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (679943513) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 37890 + ... + 52872.

It is an arithmetic number, because the mean of its divisors is an integer number (64790816).

Almost surely, 2^679943523 is an apocalyptic number.

679943523 is a deficient number, since it is larger than the sum of its proper divisors (356709533).

679943523 is a wasteful number, since it uses less digits than its factorization.

679943523 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17154.

The product of its digits is 1224720, while the sum is 48.

The square root of 679943523 is about 26075.7267012829. The cubic root of 679943523 is about 879.3415886841.

It can be divided in two parts, 67994 and 3523, that added together give a palindrome (71517).

The spelling of 679943523 in words is "six hundred seventy-nine million, nine hundred forty-three thousand, five hundred twenty-three".