63240139 has 2 divisors, whose sum is σ = 63240140. Its totient is φ = 63240138.

The previous prime is 63240137. The next prime is 63240167. The reversal of 63240139 is 93104236.

It is an a-pointer prime, because the next prime (63240167) can be obtained adding 63240139 to its sum of digits (28).

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 63240139 - 2¹ = 63240137 is a prime.

Together with 63240137, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (63240131) 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, 31620069 + 31620070.

It is an arithmetic number, because the mean of its divisors is an integer number (31620070).

Almost surely, 2^63240139 is an apocalyptic number.

63240139 is a deficient number, since it is larger than the sum of its proper divisors (1).

63240139 is an equidigital number, since it uses as much as digits as its factorization.

63240139 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3888, while the sum is 28.

The square root of 63240139 is about 7952.3668803696. The cubic root of 63240139 is about 398.4106495268.

The spelling of 63240139 in words is "sixty-three million, two hundred forty thousand, one hundred thirty-nine".