236540641 has 2 divisors, whose sum is σ = 236540642. Its totient is φ = 236540640.

The previous prime is 236540639. The next prime is 236540653. The reversal of 236540641 is 146045632.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 180230625 + 56310016 = 13425^2 + 7504^2 .

It is a cyclic number.

It is not a de Polignac number, because 236540641 - 2¹ = 236540639 is a prime.

Together with 236540639, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (236540341) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 118270320 + 118270321.

It is an arithmetic number, because the mean of its divisors is an integer number (118270321).

Almost surely, 2^236540641 is an apocalyptic number.

It is an amenable number.

236540641 is a deficient number, since it is larger than the sum of its proper divisors (1).

236540641 is an equidigital number, since it uses as much as digits as its factorization.

236540641 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 17280, while the sum is 31.

The square root of 236540641 is about 15379.8777953533. The cubic root of 236540641 is about 618.4461967960.

The spelling of 236540641 in words is "two hundred thirty-six million, five hundred forty thousand, six hundred forty-one".