263340673 has 4 divisors (see below), whose sum is σ = 263393620. Its totient is φ = 263287728.

The previous prime is 263340661. The next prime is 263340709. The reversal of 263340673 is 376043362.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 376043362 = 2 ⋅188021681.

It can be written as a sum of positive squares in 2 ways, for example, as 119508624 + 143832049 = 10932^2 + 11993^2 .

It is a cyclic number.

It is not a de Polignac number, because 263340673 - 2²⁵ = 229786241 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (263340613) 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, 18138 + ... + 29251.

It is an arithmetic number, because the mean of its divisors is an integer number (65848405).

Almost surely, 2^263340673 is an apocalyptic number.

It is an amenable number.

263340673 is a deficient number, since it is larger than the sum of its proper divisors (52947).

263340673 is an equidigital number, since it uses as much as digits as its factorization.

263340673 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 52946.

The product of its (nonzero) digits is 54432, while the sum is 34.

The square root of 263340673 is about 16227.7747396247. The cubic root of 263340673 is about 640.9723768623.

The spelling of 263340673 in words is "two hundred sixty-three million, three hundred forty thousand, six hundred seventy-three".