1387933 has 6 divisors (see below), whose sum is σ = 1414842. Its totient is φ = 1361520.

The previous prime is 1387927. The next prime is 1387943. The reversal of 1387933 is 3397831.

It can be written as a sum of positive squares in 3 ways, for example, as 49284 + 1338649 = 222^2 + 1157^2 .

It is a de Polignac number, because none of the positive numbers 2^k-1387933 is a prime.

It is a Duffinian number.

1387933 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1387913) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 3535 + ... + 3907.

It is an arithmetic number, because the mean of its divisors is an integer number (235807).

2^1387933 is an apocalyptic number.

It is an amenable number.

1387933 is a deficient number, since it is larger than the sum of its proper divisors (26909).

1387933 is an frugal number, since it uses more digits than its factorization.

1387933 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 495 (or 434 counting only the distinct ones).

The product of its digits is 13608, while the sum is 34.

The square root of 1387933 is about 1178.1056828655. The cubic root of 1387933 is about 111.5465563319.

The spelling of 1387933 in words is "one million, three hundred eighty-seven thousand, nine hundred thirty-three".