1387797 has 8 divisors (see below), whose sum is σ = 1930944. Its totient is φ = 884928.

The previous prime is 1387783. The next prime is 1387801. The reversal of 1387797 is 7977831.

It is a happy number.

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

It is not a de Polignac number, because 1387797 - 2⁴ = 1387781 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1387717) 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, 9988 + ... + 10125.

It is an arithmetic number, because the mean of its divisors is an integer number (241368).

2^1387797 is an apocalyptic number.

It is an amenable number.

1387797 is a deficient number, since it is larger than the sum of its proper divisors (543147).

1387797 is a wasteful number, since it uses less digits than its factorization.

1387797 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20139.

The product of its digits is 74088, while the sum is 42.

The square root of 1387797 is about 1178.0479616722. The cubic root of 1387797 is about 111.5429128258.

The spelling of 1387797 in words is "one million, three hundred eighty-seven thousand, seven hundred ninety-seven".