1393969 has 2 divisors, whose sum is σ = 1393970. Its totient is φ = 1393968.

The previous prime is 1393967. The next prime is 1393979. The reversal of 1393969 is 9693931.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1311025 + 82944 = 1145^2 + 288^2 .

It is a cyclic number.

It is not a de Polignac number, because 1393969 - 2¹ = 1393967 is a prime.

It is a super-2 number, since 2×1393969² = 3886299145922, which contains 22 as substring.

Together with 1393967, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (1393963) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 696984 + 696985.

It is an arithmetic number, because the mean of its divisors is an integer number (696985).

2^1393969 is an apocalyptic number.

It is an amenable number.

1393969 is a deficient number, since it is larger than the sum of its proper divisors (1).

1393969 is an equidigital number, since it uses as much as digits as its factorization.

1393969 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 39366, while the sum is 40.

The square root of 1393969 is about 1180.6646433260. The cubic root of 1393969 is about 111.7080245804.

The spelling of 1393969 in words is "one million, three hundred ninety-three thousand, nine hundred sixty-nine".