1393887 has 8 divisors (see below), whose sum is σ = 2027520. Its totient is φ = 844760.

The previous prime is 1393883. The next prime is 1393891. The reversal of 1393887 is 7883931.

It is an interprime number because it is at equal distance from previous prime (1393883) and next prime (1393891).

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 1393887 - 2² = 1393883 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1393883) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 21087 + ... + 21152.

It is an arithmetic number, because the mean of its divisors is an integer number (253440).

2^1393887 is an apocalyptic number.

1393887 is a deficient number, since it is larger than the sum of its proper divisors (633633).

1393887 is a wasteful number, since it uses less digits than its factorization.

1393887 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42253.

The product of its digits is 36288, while the sum is 39.

The square root of 1393887 is about 1180.6299166123. The cubic root of 1393887 is about 111.7058341353.

The spelling of 1393887 in words is "one million, three hundred ninety-three thousand, eight hundred eighty-seven".