1380663 has 6 divisors (see below), whose sum is σ = 1994304. Its totient is φ = 920436.

The previous prime is 1380653. The next prime is 1380671. The reversal of 1380663 is 3660831.

It is not a de Polignac number, because 1380663 - 2¹⁰ = 1379639 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1380623) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 76695 + ... + 76712.

It is an arithmetic number, because the mean of its divisors is an integer number (332384).

2^1380663 is an apocalyptic number.

1380663 is a deficient number, since it is larger than the sum of its proper divisors (613641).

1380663 is a wasteful number, since it uses less digits than its factorization.

1380663 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 153413 (or 153410 counting only the distinct ones).

The product of its (nonzero) digits is 2592, while the sum is 27.

The square root of 1380663 is about 1175.0161701015. The cubic root of 1380663 is about 111.3514548134.

The spelling of 1380663 in words is "one million, three hundred eighty thousand, six hundred sixty-three".