1363889 has 4 divisors (see below), whose sum is σ = 1372224. Its totient is φ = 1355556.

The previous prime is 1363883. The next prime is 1363891. The reversal of 1363889 is 9883631.

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: 9883631 = 929 ⋅10639.

It is a cyclic number.

It is not a de Polignac number, because 1363889 - 2²⁰ = 315313 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (1363883) 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, 3917 + ... + 4250.

It is an arithmetic number, because the mean of its divisors is an integer number (343056).

2^1363889 is an apocalyptic number.

It is an amenable number.

1363889 is a deficient number, since it is larger than the sum of its proper divisors (8335).

1363889 is an equidigital number, since it uses as much as digits as its factorization.

1363889 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8334.

The product of its digits is 31104, while the sum is 38.

The square root of 1363889 is about 1167.8565836609. The cubic root of 1363889 is about 110.8986711563.

The spelling of 1363889 in words is "one million, three hundred sixty-three thousand, eight hundred eighty-nine".