1376809 has 4 divisors (see below), whose sum is σ = 1573504. Its totient is φ = 1180116.

The previous prime is 1376789. The next prime is 1376819. The reversal of 1376809 is 9086731.

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.

It is not a de Polignac number, because 1376809 - 2⁵ = 1376777 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1376819) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 98337 + ... + 98350.

It is an arithmetic number, because the mean of its divisors is an integer number (393376).

2^1376809 is an apocalyptic number.

It is an amenable number.

1376809 is a deficient number, since it is larger than the sum of its proper divisors (196695).

1376809 is an equidigital number, since it uses as much as digits as its factorization.

1376809 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 196694.

The product of its (nonzero) digits is 9072, while the sum is 34.

The square root of 1376809 is about 1173.3750466070. The cubic root of 1376809 is about 111.2477489760.

The spelling of 1376809 in words is "one million, three hundred seventy-six thousand, eight hundred nine".