1393631 has 8 divisors (see below), whose sum is σ = 1503600. Its totient is φ = 1287360.

The previous prime is 1393627. The next prime is 1393633. The reversal of 1393631 is 1363931.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1393631 - 2² = 1393627 is a prime.

It is a super-2 number, since 2×1393631² = 3884414728322, which contains 22 as substring.

It is an Ulam number.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1393631.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1393633) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 116 + ... + 1673.

It is an arithmetic number, because the mean of its divisors is an integer number (187950).

2^1393631 is an apocalyptic number.

1393631 is a deficient number, since it is larger than the sum of its proper divisors (109969).

1393631 is a wasteful number, since it uses less digits than its factorization.

1393631 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1849.

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

The square root of 1393631 is about 1180.5214949335. The cubic root of 1393631 is about 111.6989951198.

The spelling of 1393631 in words is "one million, three hundred ninety-three thousand, six hundred thirty-one".