1389717 has 48 divisors (see below), whose sum is σ = 2562560. Its totient is φ = 734832.

The previous prime is 1389697. The next prime is 1389727. The reversal of 1389717 is 7179831.

It is not a de Polignac number, because 1389717 - 2⁷ = 1389589 is a prime.

It is an Ulam number.

Its product of digits (10584) is a multiple of the sum of its prime divisors (72).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1389727) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 32298 + ... + 32340.

2^1389717 is an apocalyptic number.

It is an amenable number.

1389717 is a deficient number, since it is larger than the sum of its proper divisors (1172843).

1389717 is an equidigital number, since it uses as much as digits as its factorization.

1389717 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 84 (or 72 counting only the distinct ones).

The product of its digits is 10584, while the sum is 36.

The square root of 1389717 is about 1178.8625874121. The cubic root of 1389717 is about 111.5943285359.

Adding to 1389717 its product of digits (10584), we get a triangular number (1400301 = T₁₆₇₃).

The spelling of 1389717 in words is "one million, three hundred eighty-nine thousand, seven hundred seventeen".