1639105093 has 4 divisors (see below), whose sum is σ = 1679083308. Its totient is φ = 1599126880.

The previous prime is 1639105043. The next prime is 1639105103. The reversal of 1639105093 is 3905019361.

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

It can be written as a sum of positive squares in 2 ways, for example, as 30052324 + 1609052769 = 5482^2 + 40113^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1639105093 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 (1639105043) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 19989046 + ... + 19989127.

It is an arithmetic number, because the mean of its divisors is an integer number (419770827).

Almost surely, 2^1639105093 is an apocalyptic number.

It is an amenable number.

1639105093 is a deficient number, since it is larger than the sum of its proper divisors (39978215).

1639105093 is an equidigital number, since it uses as much as digits as its factorization.

1639105093 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39978214.

The product of its (nonzero) digits is 21870, while the sum is 37.

The square root of 1639105093 is about 40485.8628782937. The cubic root of 1639105093 is about 1179.0591689063.

The spelling of 1639105093 in words is "one billion, six hundred thirty-nine million, one hundred five thousand, ninety-three".