263242891 has 16 divisors (see below), whose sum is σ = 286273440. Its totient is φ = 241263360.

The previous prime is 263242873. The next prime is 263242907. The reversal of 263242891 is 198242362.

It is a happy number.

263242891 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a cyclic number.

It is not a de Polignac number, because 263242891 - 2¹⁷ = 263111819 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 263242891.

It is not an unprimeable number, because it can be changed into a prime (263242801) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 71721 + ... + 75301.

It is an arithmetic number, because the mean of its divisors is an integer number (17892090).

Almost surely, 2^263242891 is an apocalyptic number.

263242891 is a deficient number, since it is larger than the sum of its proper divisors (23030549).

263242891 is a wasteful number, since it uses less digits than its factorization.

263242891 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3726.

The product of its digits is 41472, while the sum is 37.

The square root of 263242891 is about 16224.7616623481. The cubic root of 263242891 is about 640.8930330991.

The spelling of 263242891 in words is "two hundred sixty-three million, two hundred forty-two thousand, eight hundred ninety-one".