1399917 has 8 divisors (see below), whose sum is σ = 1931040. Its totient is φ = 901040.

The previous prime is 1399913. The next prime is 1399919. The reversal of 1399917 is 7199931.

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

It is a cyclic number.

It is not a de Polignac number, because 1399917 - 2² = 1399913 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1399913) 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, 7959 + ... + 8132.

It is an arithmetic number, because the mean of its divisors is an integer number (241380).

2^1399917 is an apocalyptic number.

It is an amenable number.

1399917 is a deficient number, since it is larger than the sum of its proper divisors (531123).

1399917 is a wasteful number, since it uses less digits than its factorization.

1399917 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16123.

The product of its digits is 15309, while the sum is 39.

The square root of 1399917 is about 1183.1808821985. The cubic root of 1399917 is about 111.8666834220.

It can be divided in two parts, 13 and 99917, that multiplied together give a palindrome (1298921).

The spelling of 1399917 in words is "one million, three hundred ninety-nine thousand, nine hundred seventeen".