1387397 has 4 divisors (see below), whose sum is σ = 1513536. Its totient is φ = 1261260.

The previous prime is 1387367. The next prime is 1387403. The reversal of 1387397 is 7937831.

It is a happy number.

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: 7937831 = 11 ⋅721621.

It is not a de Polignac number, because 1387397 - 2¹² = 1383301 is a prime.

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 1387397.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1387327) 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, 63053 + ... + 63074.

It is an arithmetic number, because the mean of its divisors is an integer number (378384).

2^1387397 is an apocalyptic number.

It is an amenable number.

1387397 is a deficient number, since it is larger than the sum of its proper divisors (126139).

1387397 is a wasteful number, since it uses less digits than its factorization.

1387397 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 126138.

The product of its digits is 31752, while the sum is 38.

The square root of 1387397 is about 1177.8781770625. The cubic root of 1387397 is about 111.5321952515.

The spelling of 1387397 in words is "one million, three hundred eighty-seven thousand, three hundred ninety-seven".