271639939 has 4 divisors (see below), whose sum is σ = 271948456. Its totient is φ = 271331424.

The previous prime is 271639891. The next prime is 271639961. The reversal of 271639939 is 939936172.

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

It is a cyclic number.

It is not a de Polignac number, because 271639939 - 2⁷ = 271639811 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 271639892 and 271639901.

It is not an unprimeable number, because it can be changed into a prime (271639969) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 152934 + ... + 154699.

It is an arithmetic number, because the mean of its divisors is an integer number (67987114).

Almost surely, 2^271639939 is an apocalyptic number.

271639939 is a deficient number, since it is larger than the sum of its proper divisors (308517).

271639939 is an equidigital number, since it uses as much as digits as its factorization.

271639939 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 308516.

The product of its digits is 551124, while the sum is 49.

The square root of 271639939 is about 16481.5029351088. The cubic root of 271639939 is about 647.6363374750.

The spelling of 271639939 in words is "two hundred seventy-one million, six hundred thirty-nine thousand, nine hundred thirty-nine".