243460591961 has 2 divisors, whose sum is σ = 243460591962. Its totient is φ = 243460591960.

The previous prime is 243460591909. The next prime is 243460592003. The reversal of 243460591961 is 169195064342.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 200105023561 + 43355568400 = 447331^2 + 208220^2 .

It is a cyclic number.

It is not a de Polignac number, because 243460591961 - 2³⁴ = 226280722777 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (243460591261) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 121730295980 + 121730295981.

It is an arithmetic number, because the mean of its divisors is an integer number (121730295981).

Almost surely, 2^243460591961 is an apocalyptic number.

It is an amenable number.

243460591961 is a deficient number, since it is larger than the sum of its proper divisors (1).

243460591961 is an equidigital number, since it uses as much as digits as its factorization.

243460591961 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1399680, while the sum is 50.

The spelling of 243460591961 in words is "two hundred forty-three billion, four hundred sixty million, five hundred ninety-one thousand, nine hundred sixty-one".