1379670809 has 8 divisors (see below), whose sum is σ = 1530606240. Its totient is φ = 1232987200.

The previous prime is 1379670749. The next prime is 1379670821. The reversal of 1379670809 is 9080769731.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1379670809 - 2¹² = 1379666713 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1379670829) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1062272 + ... + 1063569.

It is an arithmetic number, because the mean of its divisors is an integer number (191325780).

Almost surely, 2^1379670809 is an apocalyptic number.

It is an amenable number.

1379670809 is a deficient number, since it is larger than the sum of its proper divisors (150935431).

1379670809 is a wasteful number, since it uses less digits than its factorization.

1379670809 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2125911.

The product of its (nonzero) digits is 571536, while the sum is 50.

The square root of 1379670809 is about 37143.9202158307. The cubic root of 1379670809 is about 1113.2477478422.

The spelling of 1379670809 in words is "one billion, three hundred seventy-nine million, six hundred seventy thousand, eight hundred nine".