1363391 has 4 divisors (see below), whose sum is σ = 1378800. Its totient is φ = 1347984.

The previous prime is 1363381. The next prime is 1363393. The reversal of 1363391 is 1933631.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1363391 - 2¹⁰ = 1362367 is a prime.

It is a Duffinian number.

It is a plaindrome in base 12.

It is a self number, because there is not a number n which added to its sum of digits gives 1363391.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1363393) 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, 7571 + ... + 7748.

It is an arithmetic number, because the mean of its divisors is an integer number (344700).

2^1363391 is an apocalyptic number.

1363391 is a deficient number, since it is larger than the sum of its proper divisors (15409).

1363391 is an equidigital number, since it uses as much as digits as its factorization.

1363391 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15408.

The product of its digits is 1458, while the sum is 26.

The square root of 1363391 is about 1167.6433530835. The cubic root of 1363391 is about 110.8851719489.

The spelling of 1363391 in words is "one million, three hundred sixty-three thousand, three hundred ninety-one".