1339969 has 2 divisors, whose sum is σ = 1339970.
Its totient is φ = 1339968.
The previous prime is 1339951. The next prime is 1339973. The reversal of 1339969 is 9699331.
It is a strong prime.
It can be written as a sum of positive squares in only one way, i.e., 680625 + 659344 = 825^2 + 812^2
It is an emirp because it is prime and its reverse (9699331) is a distict prime.
It is a cyclic number.
It is not a de Polignac number, because 1339969 - 219 = 815681 is a prime.
It is a super-2 number, since 2×13399692 = 3591033841922, which contains 22 as substring.
It is a Chen prime.
It is not a weakly prime, because it can be changed into another prime (1339909) by changing a digit.
It is a polite number, since it can be written as a sum of consecutive naturals, namely, 669984 + 669985.
It is an arithmetic number, because the mean of its divisors is an integer number (669985).
21339969 is an apocalyptic number.
It is an amenable number.
1339969 is a deficient number, since it is larger than the sum of its proper divisors (1).
1339969 is an equidigital number, since it uses as much as digits as its factorization.
1339969 is an evil number, because the sum of its binary digits is even.
The product of its digits is 39366, while the sum is 40.
The square root of 1339969 is about 1157.5703002410.
The cubic root of 1339969 is about 110.2465269721.
The spelling of 1339969 in words is "one million, three hundred thirty-nine thousand, nine hundred sixty-nine".