264643343 has 4 divisors (see below), whose sum is σ = 278571960. Its totient is φ = 250714728.

The previous prime is 264643321. The next prime is 264643349. The reversal of 264643343 is 343346462.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 343346462 = 2 ⋅171673231.

It is not a de Polignac number, because 264643343 - 2²⁴ = 247866127 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 (264643349) 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, 6964280 + ... + 6964317.

It is an arithmetic number, because the mean of its divisors is an integer number (69642990).

Almost surely, 2^264643343 is an apocalyptic number.

264643343 is a deficient number, since it is larger than the sum of its proper divisors (13928617).

264643343 is a wasteful number, since it uses less digits than its factorization.

264643343 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13928616.

The product of its digits is 124416, while the sum is 35.

The square root of 264643343 is about 16267.8622750502. The cubic root of 264643343 is about 642.0275404444.

The spelling of 264643343 in words is "two hundred sixty-four million, six hundred forty-three thousand, three hundred forty-three".