1679612889 has 4 divisors (see below), whose sum is σ = 2239483856. Its totient is φ = 1119741924.

The previous prime is 1679612843. The next prime is 1679612933. The reversal of 1679612889 is 9882169761.

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: 9882169761 = 3 ⋅3294056587.

It is not a de Polignac number, because 1679612889 - 2¹⁵ = 1679580121 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1679612089) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 279935479 + ... + 279935484.

It is an arithmetic number, because the mean of its divisors is an integer number (559870964).

Almost surely, 2^1679612889 is an apocalyptic number.

It is an amenable number.

1679612889 is a deficient number, since it is larger than the sum of its proper divisors (559870967).

1679612889 is an equidigital number, since it uses as much as digits as its factorization.

1679612889 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 559870966.

The product of its digits is 2612736, while the sum is 57.

The square root of 1679612889 is about 40983.0805211126. The cubic root of 1679612889 is about 1188.6930756985.

The spelling of 1679612889 in words is "one billion, six hundred seventy-nine million, six hundred twelve thousand, eight hundred eighty-nine".