243641966 has 16 divisors (see below), whose sum is σ = 375755856. Its totient is φ = 118397376.

The previous prime is 243641941. The next prime is 243641987. The reversal of 243641966 is 669146342.

It is a super-2 number, since 2×243641966² = 118722815192690312, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 121625 + ... + 123611.

It is an arithmetic number, because the mean of its divisors is an integer number (23484741).

Almost surely, 2^243641966 is an apocalyptic number.

243641966 is a deficient number, since it is larger than the sum of its proper divisors (132113890).

243641966 is a wasteful number, since it uses less digits than its factorization.

243641966 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3683.

The product of its digits is 186624, while the sum is 41.

The square root of 243641966 is about 15609.0347555510. The cubic root of 243641966 is about 624.5741876133.

The spelling of 243641966 in words is "two hundred forty-three million, six hundred forty-one thousand, nine hundred sixty-six".