1393489439 has 8 divisors (see below), whose sum is σ = 1475962560. Its totient is φ = 1311072256.

The previous prime is 1393489423. The next prime is 1393489451. The reversal of 1393489439 is 9349843931.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1393489439 - 2⁴ = 1393489423 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1393483439) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 44282 + ... + 68904.

It is an arithmetic number, because the mean of its divisors is an integer number (184495320).

Almost surely, 2^1393489439 is an apocalyptic number.

1393489439 is a deficient number, since it is larger than the sum of its proper divisors (82473121).

1393489439 is a wasteful number, since it uses less digits than its factorization.

1393489439 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27969.

The product of its digits is 2519424, while the sum is 53.

The square root of 1393489439 is about 37329.4714535312. The cubic root of 1393489439 is about 1116.9521297164.

The spelling of 1393489439 in words is "one billion, three hundred ninety-three million, four hundred eighty-nine thousand, four hundred thirty-nine".