1389893813 has 8 divisors (see below), whose sum is σ = 1732854720. Its totient is φ = 1083034080.

The previous prime is 1389893801. The next prime is 1389893849. The reversal of 1389893813 is 3183989831.

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 a de Polignac number, because none of the positive numbers 2^k-1389893813 is a prime.

It is a super-2 number, since 2×1389893813² = 3863609622831357938, 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 (1389893873) 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, 9025208 + ... + 9025361.

It is an arithmetic number, because the mean of its divisors is an integer number (216606840).

Almost surely, 2^1389893813 is an apocalyptic number.

It is an amenable number.

1389893813 is a deficient number, since it is larger than the sum of its proper divisors (342960907).

1389893813 is a wasteful number, since it uses less digits than its factorization.

1389893813 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18050587.

The product of its digits is 1119744, while the sum is 53.

The square root of 1389893813 is about 37281.2796588315. The cubic root of 1389893813 is about 1115.9906103213.

The spelling of 1389893813 in words is "one billion, three hundred eighty-nine million, eight hundred ninety-three thousand, eight hundred thirteen".