1589420639 has 4 divisors (see below), whose sum is σ = 1589887056. Its totient is φ = 1588954224.

The previous prime is 1589420633. The next prime is 1589420641. The reversal of 1589420639 is 9360249851.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1589420639 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1589420593 and 1589420602.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1589420633) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 228059 + ... + 234924.

It is an arithmetic number, because the mean of its divisors is an integer number (397471764).

Almost surely, 2^1589420639 is an apocalyptic number.

1589420639 is a deficient number, since it is larger than the sum of its proper divisors (466417).

1589420639 is an equidigital number, since it uses as much as digits as its factorization.

1589420639 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 466416.

The product of its (nonzero) digits is 466560, while the sum is 47.

The square root of 1589420639 is about 39867.5386624256. The cubic root of 1589420639 is about 1167.0235393780.

The spelling of 1589420639 in words is "one billion, five hundred eighty-nine million, four hundred twenty thousand, six hundred thirty-nine".