264139329 has 4 divisors (see below), whose sum is σ = 352185776. Its totient is φ = 176092884.

The previous prime is 264139327. The next prime is 264139357. The reversal of 264139329 is 923931462.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 264139329 - 2¹ = 264139327 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (264139327) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 44023219 + ... + 44023224.

It is an arithmetic number, because the mean of its divisors is an integer number (88046444).

Almost surely, 2^264139329 is an apocalyptic number.

It is an amenable number.

264139329 is a deficient number, since it is larger than the sum of its proper divisors (88046447).

264139329 is an equidigital number, since it uses as much as digits as its factorization.

264139329 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 88046446.

The product of its digits is 69984, while the sum is 39.

The square root of 264139329 is about 16252.3637973065. The cubic root of 264139329 is about 641.6197003311.

The spelling of 264139329 in words is "two hundred sixty-four million, one hundred thirty-nine thousand, three hundred twenty-nine".