263128413 has 4 divisors (see below), whose sum is σ = 350837888. Its totient is φ = 175418940.

The previous prime is 263128391. The next prime is 263128421. The reversal of 263128413 is 314821362.

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 263128413 - 2⁸ = 263128157 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 (263128433) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 43854733 + ... + 43854738.

It is an arithmetic number, because the mean of its divisors is an integer number (87709472).

Almost surely, 2^263128413 is an apocalyptic number.

It is an amenable number.

263128413 is a deficient number, since it is larger than the sum of its proper divisors (87709475).

263128413 is an equidigital number, since it uses as much as digits as its factorization.

263128413 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 87709474.

The product of its digits is 6912, while the sum is 30.

The square root of 263128413 is about 16221.2333994675. The cubic root of 263128413 is about 640.8001166418.

Adding to 263128413 its reverse (314821362), we get a palindrome (577949775).

The spelling of 263128413 in words is "two hundred sixty-three million, one hundred twenty-eight thousand, four hundred thirteen".