1381863329 has 16 divisors (see below), whose sum is σ = 1755354240. Its totient is φ = 1056456960.

The previous prime is 1381863271. The next prime is 1381863337. The reversal of 1381863329 is 9233681831.

It is a cyclic number.

It is not a de Polignac number, because 1381863329 - 2¹⁶ = 1381797793 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 1381863329.

It is not an unprimeable number, because it can be changed into a prime (1381863029) 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, 165224 + ... + 173385.

It is an arithmetic number, because the mean of its divisors is an integer number (109709640).

Almost surely, 2^1381863329 is an apocalyptic number.

It is an amenable number.

1381863329 is a deficient number, since it is larger than the sum of its proper divisors (373490911).

1381863329 is a wasteful number, since it uses less digits than its factorization.

1381863329 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 338680.

The product of its digits is 186624, while the sum is 44.

The square root of 1381863329 is about 37173.4223471555. The cubic root of 1381863329 is about 1113.8371459617.

The spelling of 1381863329 in words is "one billion, three hundred eighty-one million, eight hundred sixty-three thousand, three hundred twenty-nine".