263431663 has 16 divisors (see below), whose sum is σ = 294368256. Its totient is φ = 233691040.

The previous prime is 263431661. The next prime is 263431691. The reversal of 263431663 is 366134362.

It is not a de Polignac number, because 263431663 - 2¹ = 263431661 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 (263431661) 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, 259545 + ... + 260557.

It is an arithmetic number, because the mean of its divisors is an integer number (18398016).

Almost surely, 2^263431663 is an apocalyptic number.

263431663 is a deficient number, since it is larger than the sum of its proper divisors (30936593).

263431663 is a wasteful number, since it uses less digits than its factorization.

263431663 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1574.

The product of its digits is 46656, while the sum is 34.

The square root of 263431663 is about 16230.5780242110. The cubic root of 263431663 is about 641.0461917172.

The spelling of 263431663 in words is "two hundred sixty-three million, four hundred thirty-one thousand, six hundred sixty-three".