1639227109 has 32 divisors (see below), whose sum is σ = 1917538560. Its totient is φ = 1388275200.

The previous prime is 1639227103. The next prime is 1639227119. The reversal of 1639227109 is 9017229361.

It is not a de Polignac number, because 1639227109 - 2³ = 1639227101 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 (1639227101) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1589424 + ... + 1590454.

It is an arithmetic number, because the mean of its divisors is an integer number (59923080).

Almost surely, 2^1639227109 is an apocalyptic number.

1639227109 is a gapful number since it is divisible by the number (19) formed by its first and last digit.

It is an amenable number.

1639227109 is a deficient number, since it is larger than the sum of its proper divisors (278311451).

1639227109 is a wasteful number, since it uses less digits than its factorization.

1639227109 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1261.

The product of its (nonzero) digits is 40824, while the sum is 40.

The square root of 1639227109 is about 40487.3697466259. The cubic root of 1639227109 is about 1179.0884248123.

The spelling of 1639227109 in words is "one billion, six hundred thirty-nine million, two hundred twenty-seven thousand, one hundred nine".