263492979 has 12 divisors (see below), whose sum is σ = 372153816. Its totient is φ = 165256192.

The previous prime is 263492953. The next prime is 263493017. The reversal of 263492979 is 979294362.

It is not a de Polignac number, because 263492979 - 2²⁵ = 229938547 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (51).

It is not an unprimeable number, because it can be changed into a prime (263492939) 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 11 ways as a sum of consecutive naturals, for example, 114787 + ... + 117059.

It is an arithmetic number, because the mean of its divisors is an integer number (31012818).

Almost surely, 2^263492979 is an apocalyptic number.

263492979 is a deficient number, since it is larger than the sum of its proper divisors (108660837).

263492979 is an frugal number, since it uses more digits than its factorization.

263492979 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4566 (or 2293 counting only the distinct ones).

The product of its digits is 1469664, while the sum is 51.

The square root of 263492979 is about 16232.4668180779. The cubic root of 263492979 is about 641.0959242090.

Multiplying 263492979 by its sum of digits (51), we get a square (13438141929 = 115923²).

263492979 divided by its sum of digits (51) gives a square (5166529 = 2273²).

The spelling of 263492979 in words is "two hundred sixty-three million, four hundred ninety-two thousand, nine hundred seventy-nine".