63690239 has 2 divisors, whose sum is σ = 63690240. Its totient is φ = 63690238.

The previous prime is 63690229. The next prime is 63690241. The reversal of 63690239 is 93209636.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 63690239 - 2¹⁶ = 63624703 is a prime.

It is a Sophie Germain prime.

Together with 63690241, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (63690229) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 31845119 + 31845120.

It is an arithmetic number, because the mean of its divisors is an integer number (31845120).

Almost surely, 2^63690239 is an apocalyptic number.

63690239 is a deficient number, since it is larger than the sum of its proper divisors (1).

63690239 is an equidigital number, since it uses as much as digits as its factorization.

63690239 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 52488, while the sum is 38.

The square root of 63690239 is about 7980.6164548862. The cubic root of 63690239 is about 399.3536206302.

The spelling of 63690239 in words is "sixty-three million, six hundred ninety thousand, two hundred thirty-nine".