263625913 has 4 divisors (see below), whose sum is σ = 263764368. Its totient is φ = 263487460.

The previous prime is 263625889. The next prime is 263625937. The reversal of 263625913 is 319526362.

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 an interprime number because it is at equal distance from previous prime (263625889) and next prime (263625937).

It is a cyclic number.

It is not a de Polignac number, because 263625913 - 2⁵ = 263625881 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (263625013) 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, 66331 + ... + 70192.

It is an arithmetic number, because the mean of its divisors is an integer number (65941092).

Almost surely, 2^263625913 is an apocalyptic number.

It is an amenable number.

263625913 is a deficient number, since it is larger than the sum of its proper divisors (138455).

263625913 is a wasteful number, since it uses less digits than its factorization.

263625913 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 138454.

The product of its digits is 58320, while the sum is 37.

The square root of 263625913 is about 16236.5609967136. The cubic root of 263625913 is about 641.2037185014.

The spelling of 263625913 in words is "two hundred sixty-three million, six hundred twenty-five thousand, nine hundred thirteen".