263481461 has 4 divisors (see below), whose sum is σ = 264138924. Its totient is φ = 262824000.

The previous prime is 263481451. The next prime is 263481469. The reversal of 263481461 is 164184362.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 261436561 + 2044900 = 16169^2 + 1430^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-263481461 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 (263481469) 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, 328130 + ... + 328931.

It is an arithmetic number, because the mean of its divisors is an integer number (66034731).

Almost surely, 2^263481461 is an apocalyptic number.

It is an amenable number.

263481461 is a deficient number, since it is larger than the sum of its proper divisors (657463).

263481461 is an equidigital number, since it uses as much as digits as its factorization.

263481461 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 657462.

The product of its digits is 27648, while the sum is 35.

The square root of 263481461 is about 16232.1120314024. The cubic root of 263481461 is about 641.0865827198.

The spelling of 263481461 in words is "two hundred sixty-three million, four hundred eighty-one thousand, four hundred sixty-one".