1679559697 has 4 divisors (see below), whose sum is σ = 1699795440. Its totient is φ = 1659323956.

The previous prime is 1679559677. The next prime is 1679559703. The reversal of 1679559697 is 7969559761.

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.

It is a cyclic number.

It is not a de Polignac number, because 1679559697 - 2⁷ = 1679559569 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1679559677) 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, 10117747 + ... + 10117912.

It is an arithmetic number, because the mean of its divisors is an integer number (424948860).

Almost surely, 2^1679559697 is an apocalyptic number.

It is an amenable number.

1679559697 is a deficient number, since it is larger than the sum of its proper divisors (20235743).

1679559697 is an equidigital number, since it uses as much as digits as its factorization.

1679559697 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20235742.

The product of its digits is 32148900, while the sum is 64.

The square root of 1679559697 is about 40982.4315652451. The cubic root of 1679559697 is about 1188.6805272456.

Adding to 1679559697 its sum of digits (64), we get a palindrome (1679559761).

The spelling of 1679559697 in words is "one billion, six hundred seventy-nine million, five hundred fifty-nine thousand, six hundred ninety-seven".