1371663 has 6 divisors (see below), whose sum is σ = 1981304. Its totient is φ = 914436.

The previous prime is 1371661. The next prime is 1371683. The reversal of 1371663 is 3661731.

It is not a de Polignac number, because 1371663 - 2¹ = 1371661 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 (1371661) 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, 76195 + ... + 76212.

2^1371663 is an apocalyptic number.

1371663 is a deficient number, since it is larger than the sum of its proper divisors (609641).

1371663 is a wasteful number, since it uses less digits than its factorization.

1371663 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 152413 (or 152410 counting only the distinct ones).

The product of its digits is 2268, while the sum is 27.

The square root of 1371663 is about 1171.1801740125. The cubic root of 1371663 is about 111.1089750330.

The spelling of 1371663 in words is "one million, three hundred seventy-one thousand, six hundred sixty-three".