243290741 has 4 divisors (see below), whose sum is σ = 243446400. Its totient is φ = 243135084.

The previous prime is 243290737. The next prime is 243290743. The reversal of 243290741 is 147092342.

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 243290741 - 2² = 243290737 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 243290698 and 243290707.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (243290743) 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, 75461 + ... + 78618.

It is an arithmetic number, because the mean of its divisors is an integer number (60861600).

Almost surely, 2^243290741 is an apocalyptic number.

It is an amenable number.

243290741 is a deficient number, since it is larger than the sum of its proper divisors (155659).

243290741 is a wasteful number, since it uses less digits than its factorization.

243290741 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 155658.

The product of its (nonzero) digits is 12096, while the sum is 32.

The square root of 243290741 is about 15597.7800022952. The cubic root of 243290741 is about 624.2739224783.

The spelling of 243290741 in words is "two hundred forty-three million, two hundred ninety thousand, seven hundred forty-one".