1373609811 has 16 divisors (see below), whose sum is σ = 2095518464. Its totient is φ = 784020384.

The previous prime is 1373609779. The next prime is 1373609821. The reversal of 1373609811 is 1189063731.

It is not a de Polignac number, because 1373609811 - 2⁵ = 1373609779 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1373609811.

It is not an unprimeable number, because it can be changed into a prime (1373609821) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 18496 + ... + 55581.

It is an arithmetic number, because the mean of its divisors is an integer number (130969904).

Almost surely, 2^1373609811 is an apocalyptic number.

1373609811 is a deficient number, since it is larger than the sum of its proper divisors (721908653).

1373609811 is an equidigital number, since it uses as much as digits as its factorization.

1373609811 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 74970.

The product of its (nonzero) digits is 27216, while the sum is 39.

The square root of 1373609811 is about 37062.2423903357. The cubic root of 1373609811 is about 1111.6151610165.

The spelling of 1373609811 in words is "one billion, three hundred seventy-three million, six hundred nine thousand, eight hundred eleven".