1339639858 has 4 divisors (see below), whose sum is σ = 2009459790. Its totient is φ = 669819928.

The previous prime is 1339639823. The next prime is 1339639877. The reversal of 1339639858 is 8589369331.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 1149006609 + 190633249 = 33897^2 + 13807^2 .

It is a junction number, because it is equal to n+sod(n) for n = 1339639799 and 1339639808.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 334909963 + ... + 334909966.

Almost surely, 2^1339639858 is an apocalyptic number.

1339639858 is a deficient number, since it is larger than the sum of its proper divisors (669819932).

1339639858 is an equidigital number, since it uses as much as digits as its factorization.

1339639858 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 669819931.

The product of its digits is 4199040, while the sum is 55.

The square root of 1339639858 is about 36601.0909400253. The cubic root of 1339639858 is about 1102.3749946625.

The spelling of 1339639858 in words is "one billion, three hundred thirty-nine million, six hundred thirty-nine thousand, eight hundred fifty-eight".