1381339877 has 4 divisors (see below), whose sum is σ = 1381508940. Its totient is φ = 1381170816.

The previous prime is 1381339873. The next prime is 1381339891. The reversal of 1381339877 is 7789331831.

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 142229476 + 1239110401 = 11926^2 + 35201^2 .

It is a cyclic number.

It is not a de Polignac number, because 1381339877 - 2² = 1381339873 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1381339873) 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, 71618 + ... + 88835.

It is an arithmetic number, because the mean of its divisors is an integer number (345377235).

Almost surely, 2^1381339877 is an apocalyptic number.

It is an amenable number.

1381339877 is a deficient number, since it is larger than the sum of its proper divisors (169063).

1381339877 is an equidigital number, since it uses as much as digits as its factorization.

1381339877 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 169062.

The product of its digits is 762048, while the sum is 50.

The square root of 1381339877 is about 37166.3810048813. The cubic root of 1381339877 is about 1113.6964871127.

The spelling of 1381339877 in words is "one billion, three hundred eighty-one million, three hundred thirty-nine thousand, eight hundred seventy-seven".