1388697 has 4 divisors (see below), whose sum is σ = 1851600. Its totient is φ = 925796.

The previous prime is 1388693. The next prime is 1388701. The reversal of 1388697 is 7968831.

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.

It is an interprime number because it is at equal distance from previous prime (1388693) and next prime (1388701).

It is a cyclic number.

It is not a de Polignac number, because 1388697 - 2² = 1388693 is a prime.

It is a D-number.

It is not an unprimeable number, because it can be changed into a prime (1388693) 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, 231447 + ... + 231452.

It is an arithmetic number, because the mean of its divisors is an integer number (462900).

2^1388697 is an apocalyptic number.

It is an amenable number.

1388697 is a deficient number, since it is larger than the sum of its proper divisors (462903).

1388697 is an equidigital number, since it uses as much as digits as its factorization.

1388697 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 462902.

The product of its digits is 72576, while the sum is 42.

The square root of 1388697 is about 1178.4298876047. The cubic root of 1388697 is about 111.5670198406.

The spelling of 1388697 in words is "one million, three hundred eighty-eight thousand, six hundred ninety-seven".