240638137 has 2 divisors, whose sum is σ = 240638138. Its totient is φ = 240638136.

The previous prime is 240638131. The next prime is 240638141. The reversal of 240638137 is 731836042.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 224670121 + 15968016 = 14989^2 + 3996^2 .

It is a cyclic number.

It is not a de Polignac number, because 240638137 - 2¹¹ = 240636089 is a prime.

It is not a weakly prime, because it can be changed into another prime (240638131) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 120319068 + 120319069.

It is an arithmetic number, because the mean of its divisors is an integer number (120319069).

Almost surely, 2^240638137 is an apocalyptic number.

It is an amenable number.

240638137 is a deficient number, since it is larger than the sum of its proper divisors (1).

240638137 is an equidigital number, since it uses as much as digits as its factorization.

240638137 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 24192, while the sum is 34.

The square root of 240638137 is about 15512.5154955604. The cubic root of 240638137 is about 621.9968026428.

The spelling of 240638137 in words is "two hundred forty million, six hundred thirty-eight thousand, one hundred thirty-seven".