1373839909 has 8 divisors (see below), whose sum is σ = 1480067960. Its totient is φ = 1267690176.

The previous prime is 1373839903. The next prime is 1373839963. The reversal of 1373839909 is 9099383731.

It can be written as a sum of positive squares in 4 ways, for example, as 422302500 + 951537409 = 20550^2 + 30847^2 .

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 1373839909 - 2⁵ = 1373839877 is a prime.

It is a super-2 number, since 2×1373839909² = 3774872191122256562, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1373839903) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 19807 + ... + 56035.

It is an arithmetic number, because the mean of its divisors is an integer number (185008495).

Almost surely, 2^1373839909 is an apocalyptic number.

It is an amenable number.

1373839909 is a deficient number, since it is larger than the sum of its proper divisors (106228051).

1373839909 is a wasteful number, since it uses less digits than its factorization.

1373839909 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39159.

The product of its (nonzero) digits is 1102248, while the sum is 52.

The square root of 1373839909 is about 37065.3464707940. The cubic root of 1373839909 is about 1111.6772276826.

The spelling of 1373839909 in words is "one billion, three hundred seventy-three million, eight hundred thirty-nine thousand, nine hundred nine".