1389967 has 4 divisors (see below), whose sum is σ = 1409616. Its totient is φ = 1370320.

The previous prime is 1389961. The next prime is 1389989. The reversal of 1389967 is 7699831.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 7699831 = 997 ⋅7723.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1389967 is a prime.

It is a super-2 number, since 2×1389967² = 3864016522178, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1389961) 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, 9718 + ... + 9859.

It is an arithmetic number, because the mean of its divisors is an integer number (352404).

2^1389967 is an apocalyptic number.

1389967 is a deficient number, since it is larger than the sum of its proper divisors (19649).

1389967 is an equidigital number, since it uses as much as digits as its factorization.

1389967 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19648.

The product of its digits is 81648, while the sum is 43.

The square root of 1389967 is about 1178.9686170548. The cubic root of 1389967 is about 111.6010198046.

The spelling of 1389967 in words is "one million, three hundred eighty-nine thousand, nine hundred sixty-seven".