1376247685 has 4 divisors (see below), whose sum is σ = 1651497228. Its totient is φ = 1100998144.

The previous prime is 1376247683. The next prime is 1376247701. The reversal of 1376247685 is 5867426731.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 941691969 + 434555716 = 30687^2 + 20846^2 .

It is a cyclic number.

It is not a de Polignac number, because 1376247685 - 2¹ = 1376247683 is a prime.

It is a Smith number, since the sum of its digits (49) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1376247683) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 137624764 + ... + 137624773.

It is an arithmetic number, because the mean of its divisors is an integer number (412874307).

Almost surely, 2^1376247685 is an apocalyptic number.

It is an amenable number.

1376247685 is a deficient number, since it is larger than the sum of its proper divisors (275249543).

1376247685 is an equidigital number, since it uses as much as digits as its factorization.

1376247685 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 275249542.

The product of its digits is 1693440, while the sum is 49.

The square root of 1376247685 is about 37097.8124018115. The cubic root of 1376247685 is about 1112.3262862208.

The spelling of 1376247685 in words is "one billion, three hundred seventy-six million, two hundred forty-seven thousand, six hundred eighty-five".