263140859 has 4 divisors (see below), whose sum is σ = 264091104. Its totient is φ = 262190616.

The previous prime is 263140853. The next prime is 263140883. The reversal of 263140859 is 958041362.

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 263140859 - 2¹² = 263136763 is a prime.

It is a super-2 number, since 2×263140859² = 138486223350515762, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (263140853) 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, 474707 + ... + 475260.

It is an arithmetic number, because the mean of its divisors is an integer number (66022776).

Almost surely, 2^263140859 is an apocalyptic number.

263140859 is a deficient number, since it is larger than the sum of its proper divisors (950245).

263140859 is an equidigital number, since it uses as much as digits as its factorization.

263140859 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 950244.

The product of its (nonzero) digits is 51840, while the sum is 38.

The square root of 263140859 is about 16221.6170279045. The cubic root of 263140859 is about 640.8102197855.

The spelling of 263140859 in words is "two hundred sixty-three million, one hundred forty thousand, eight hundred fifty-nine".