264400403 has 4 divisors (see below), whose sum is σ = 266084640. Its totient is φ = 262716168.

The previous prime is 264400393. The next prime is 264400429. The reversal of 264400403 is 304004462.

It is a happy number.

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 264400403 - 2¹⁴ = 264384019 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (264460403) 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, 841883 + ... + 842196.

It is an arithmetic number, because the mean of its divisors is an integer number (66521160).

Almost surely, 2^264400403 is an apocalyptic number.

264400403 is a deficient number, since it is larger than the sum of its proper divisors (1684237).

264400403 is a wasteful number, since it uses less digits than its factorization.

264400403 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1684236.

The product of its (nonzero) digits is 2304, while the sum is 23.

The square root of 264400403 is about 16260.3936914209. The cubic root of 264400403 is about 641.8310219643.

Adding to 264400403 its reverse (304004462), we get a palindrome (568404865).

The spelling of 264400403 in words is "two hundred sixty-four million, four hundred thousand, four hundred three".