264143491 has 4 divisors (see below), whose sum is σ = 278045800. Its totient is φ = 250241184.

The previous prime is 264143461. The next prime is 264143519. The reversal of 264143491 is 194341462.

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 264143491 - 2⁵ = 264143459 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (264143461) 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, 6951126 + ... + 6951163.

It is an arithmetic number, because the mean of its divisors is an integer number (69511450).

Almost surely, 2^264143491 is an apocalyptic number.

264143491 is a deficient number, since it is larger than the sum of its proper divisors (13902309).

264143491 is a wasteful number, since it uses less digits than its factorization.

264143491 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13902308.

The product of its digits is 20736, while the sum is 34.

The square root of 264143491 is about 16252.4918397149. The cubic root of 264143491 is about 641.6230702788.

The spelling of 264143491 in words is "two hundred sixty-four million, one hundred forty-three thousand, four hundred ninety-one".