1679691620 has 24 divisors (see below), whose sum is σ = 3528323064. Its totient is φ = 671691776.

The previous prime is 1679691617. The next prime is 1679691697. The reversal of 1679691620 is 261969761.

It can be written as a sum of positive squares in 4 ways, for example, as 3364 + 1679688256 = 58^2 + 40984^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 81044 + ... + 99636.

It is an arithmetic number, because the mean of its divisors is an integer number (147013461).

Almost surely, 2^1679691620 is an apocalyptic number.

1679691620 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1679691620 is an abundant number, since it is smaller than the sum of its proper divisors (1848631444).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1679691620 is a wasteful number, since it uses less digits than its factorization.

1679691620 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23119 (or 23117 counting only the distinct ones).

The product of its (nonzero) digits is 244944, while the sum is 47.

The square root of 1679691620 is about 40984.0410403855. The cubic root of 1679691620 is about 1188.7116485361.

The spelling of 1679691620 in words is "one billion, six hundred seventy-nine million, six hundred ninety-one thousand, six hundred twenty".