243087461 has 4 divisors (see below), whose sum is σ = 250929024. Its totient is φ = 235245900.

The previous prime is 243087451. The next prime is 243087469. The reversal of 243087461 is 164780342.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 243087461 - 2¹⁴ = 243071077 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 (243087469) 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, 3920735 + ... + 3920796.

It is an arithmetic number, because the mean of its divisors is an integer number (62732256).

Almost surely, 2^243087461 is an apocalyptic number.

It is an amenable number.

243087461 is a deficient number, since it is larger than the sum of its proper divisors (7841563).

243087461 is an equidigital number, since it uses as much as digits as its factorization.

243087461 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7841562.

The product of its (nonzero) digits is 32256, while the sum is 35.

The square root of 243087461 is about 15591.2623286250. The cubic root of 243087461 is about 624.1000046889.

The spelling of 243087461 in words is "two hundred forty-three million, eighty-seven thousand, four hundred sixty-one".