1389433 has 2 divisors, whose sum is σ = 1389434. Its totient is φ = 1389432.

The previous prime is 1389431. The next prime is 1389439. The reversal of 1389433 is 3349831.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1352569 + 36864 = 1163^2 + 192^2 .

It is a cyclic number.

It is not a de Polignac number, because 1389433 - 2¹ = 1389431 is a prime.

It is a super-2 number, since 2×1389433² = 3861048122978, which contains 22 as substring.

Together with 1389431, it forms a pair of twin primes.

It is a junction number, because it is equal to n+sod(n) for n = 1389395 and 1389404.

It is not a weakly prime, because it can be changed into another prime (1389431) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 694716 + 694717.

It is an arithmetic number, because the mean of its divisors is an integer number (694717).

2^1389433 is an apocalyptic number.

It is an amenable number.

1389433 is a deficient number, since it is larger than the sum of its proper divisors (1).

1389433 is an equidigital number, since it uses as much as digits as its factorization.

1389433 is an evil number, because the sum of its binary digits is even.

The product of its digits is 7776, while the sum is 31.

The square root of 1389433 is about 1178.7421261667. The cubic root of 1389433 is about 111.5867262811.

The spelling of 1389433 in words is "one million, three hundred eighty-nine thousand, four hundred thirty-three".