1389960839 has 8 divisors (see below), whose sum is σ = 1408296960. Its totient is φ = 1371643416.

The previous prime is 1389960809. The next prime is 1389960841. The reversal of 1389960839 is 9380699831.

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 1389960839 - 2¹⁶ = 1389895303 is a prime.

It is a super-2 number, since 2×1389960839² = 3863982267907167842, 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 (1389960809) 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, 207074 + ... + 213680.

It is an arithmetic number, because the mean of its divisors is an integer number (176037120).

Almost surely, 2^1389960839 is an apocalyptic number.

1389960839 is a deficient number, since it is larger than the sum of its proper divisors (18336121).

1389960839 is an equidigital number, since it uses as much as digits as its factorization.

1389960839 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9349.

The product of its (nonzero) digits is 2519424, while the sum is 56.

The square root of 1389960839 is about 37282.1785710009. The cubic root of 1389960839 is about 1116.0085491459.

The spelling of 1389960839 in words is "one billion, three hundred eighty-nine million, nine hundred sixty thousand, eight hundred thirty-nine".