63240137 has 2 divisors, whose sum is σ = 63240138. Its totient is φ = 63240136.

The previous prime is 63240131. The next prime is 63240139. The reversal of 63240137 is 73104236.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 42981136 + 20259001 = 6556^2 + 4501^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-63240137 is a prime.

Together with 63240139, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (63240131) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 31620068 + 31620069.

It is an arithmetic number, because the mean of its divisors is an integer number (31620069).

Almost surely, 2^63240137 is an apocalyptic number.

It is an amenable number.

63240137 is a deficient number, since it is larger than the sum of its proper divisors (1).

63240137 is an equidigital number, since it uses as much as digits as its factorization.

63240137 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3024, while the sum is 26.

The square root of 63240137 is about 7952.3667546209. The cubic root of 63240137 is about 398.4106453268.

The spelling of 63240137 in words is "sixty-three million, two hundred forty thousand, one hundred thirty-seven".