263140889 has 4 divisors (see below), whose sum is σ = 287062800. Its totient is φ = 239218980.

The previous prime is 263140883. The next prime is 263140931. The reversal of 263140889 is 988041362.

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 263140889 - 2¹² = 263136793 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (263140883) 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, 11960939 + ... + 11960960.

It is an arithmetic number, because the mean of its divisors is an integer number (71765700).

Almost surely, 2^263140889 is an apocalyptic number.

It is an amenable number.

263140889 is a deficient number, since it is larger than the sum of its proper divisors (23921911).

263140889 is a wasteful number, since it uses less digits than its factorization.

263140889 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23921910.

The product of its (nonzero) digits is 82944, while the sum is 41.

The square root of 263140889 is about 16221.6179525965. The cubic root of 263140889 is about 640.8102441379.

The spelling of 263140889 in words is "two hundred sixty-three million, one hundred forty thousand, eight hundred eighty-nine".