1679312609 has 24 divisors (see below), whose sum is σ = 1849910400. Its totient is φ = 1523533440.

The previous prime is 1679312573. The next prime is 1679312617. The reversal of 1679312609 is 9062139761.

It is not a de Polignac number, because 1679312609 - 2¹² = 1679308513 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1679312609.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1679312629) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 4677572 + ... + 4677930.

It is an arithmetic number, because the mean of its divisors is an integer number (77079600).

Almost surely, 2^1679312609 is an apocalyptic number.

It is an amenable number.

1679312609 is a deficient number, since it is larger than the sum of its proper divisors (170597791).

1679312609 is a wasteful number, since it uses less digits than its factorization.

1679312609 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 785 (or 772 counting only the distinct ones).

The product of its (nonzero) digits is 122472, while the sum is 44.

The square root of 1679312609 is about 40979.4168943386. The cubic root of 1679312609 is about 1188.6222335752.

The spelling of 1679312609 in words is "one billion, six hundred seventy-nine million, three hundred twelve thousand, six hundred nine".