1679805553 has 4 divisors (see below), whose sum is σ = 1679922288. Its totient is φ = 1679688820.

The previous prime is 1679805539. The next prime is 1679805557. The reversal of 1679805553 is 3555089761.

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 a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1679805553 is a prime.

It is a Smith number, since the sum of its digits (49) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1679805497 and 1679805506.

It is not an unprimeable number, because it can be changed into a prime (1679805557) 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, 33151 + ... + 66772.

It is an arithmetic number, because the mean of its divisors is an integer number (419980572).

Almost surely, 2^1679805553 is an apocalyptic number.

It is an amenable number.

1679805553 is a deficient number, since it is larger than the sum of its proper divisors (116735).

1679805553 is an equidigital number, since it uses as much as digits as its factorization.

1679805553 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 116734.

The product of its (nonzero) digits is 1134000, while the sum is 49.

The square root of 1679805553 is about 40985.4309846804. The cubic root of 1679805553 is about 1188.7385245849.

The spelling of 1679805553 in words is "one billion, six hundred seventy-nine million, eight hundred five thousand, five hundred fifty-three".