1381379837 has 4 divisors (see below), whose sum is σ = 1382736480. Its totient is φ = 1380023196.

The previous prime is 1381379833. The next prime is 1381379899. The reversal of 1381379837 is 7389731831.

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, and also an emirpimes, since its reverse is a distinct semiprime: 7389731831 = 29 ⋅254818339.

It is a cyclic number.

It is not a de Polignac number, because 1381379837 - 2² = 1381379833 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 (1381379833) 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, 676793 + ... + 678830.

It is an arithmetic number, because the mean of its divisors is an integer number (345684120).

Almost surely, 2^1381379837 is an apocalyptic number.

It is an amenable number.

1381379837 is a deficient number, since it is larger than the sum of its proper divisors (1356643).

1381379837 is a wasteful number, since it uses less digits than its factorization.

1381379837 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1356642.

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

The square root of 1381379837 is about 37166.9185836007. The cubic root of 1381379837 is about 1113.7072261744.

The spelling of 1381379837 in words is "one billion, three hundred eighty-one million, three hundred seventy-nine thousand, eight hundred thirty-seven".