1363999 has 12 divisors (see below), whose sum is σ = 1689456. Its totient is φ = 1078272.

The previous prime is 1363993. The next prime is 1364009. The reversal of 1363999 is 9993631.

It is not a de Polignac number, because 1363999 - 2¹³ = 1355807 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 (1363993) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 607 + ... + 1759.

It is an arithmetic number, because the mean of its divisors is an integer number (140788).

2^1363999 is an apocalyptic number.

1363999 is a deficient number, since it is larger than the sum of its proper divisors (325457).

1363999 is a wasteful number, since it uses less digits than its factorization.

1363999 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1186 (or 1173 counting only the distinct ones).

The product of its digits is 39366, while the sum is 40.

The square root of 1363999 is about 1167.9036775351. The cubic root of 1363999 is about 110.9016524659.

The spelling of 1363999 in words is "one million, three hundred sixty-three thousand, nine hundred ninety-nine".