264171139 has 4 divisors (see below), whose sum is σ = 265175856. Its totient is φ = 263166424.

The previous prime is 264171137. The next prime is 264171163. The reversal of 264171139 is 931171462.

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 264171139 - 2¹ = 264171137 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (264171137) 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, 501964 + ... + 502489.

It is an arithmetic number, because the mean of its divisors is an integer number (66293964).

Almost surely, 2^264171139 is an apocalyptic number.

264171139 is a deficient number, since it is larger than the sum of its proper divisors (1004717).

264171139 is a wasteful number, since it uses less digits than its factorization.

264171139 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1004716.

The product of its digits is 9072, while the sum is 34.

The square root of 264171139 is about 16253.3423947199. The cubic root of 264171139 is about 641.6454558083.

It can be divided in two parts, 26417 and 1139, that added together give a square (27556 = 166²).

The spelling of 264171139 in words is "two hundred sixty-four million, one hundred seventy-one thousand, one hundred thirty-nine".