1399717 has 4 divisors (see below), whose sum is σ = 1526976. Its totient is φ = 1272460.

The previous prime is 1399709. The next prime is 1399721. The reversal of 1399717 is 7179931.

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 a cyclic number.

It is not a de Polignac number, because 1399717 - 2³ = 1399709 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1399777) 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, 63613 + ... + 63634.

It is an arithmetic number, because the mean of its divisors is an integer number (381744).

2^1399717 is an apocalyptic number.

It is an amenable number.

1399717 is a deficient number, since it is larger than the sum of its proper divisors (127259).

1399717 is a wasteful number, since it uses less digits than its factorization.

1399717 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 127258.

The product of its digits is 11907, while the sum is 37.

The square root of 1399717 is about 1183.0963612487. The cubic root of 1399717 is about 111.8613558675.

It can be divided in two parts, 1399 and 717, that added together give a square (2116 = 46²).

The spelling of 1399717 in words is "one million, three hundred ninety-nine thousand, seven hundred seventeen".