63539923 has 2 divisors, whose sum is σ = 63539924. Its totient is φ = 63539922.

The previous prime is 63539921. The next prime is 63539953. The reversal of 63539923 is 32993536.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 63539923 - 2¹ = 63539921 is a prime.

Together with 63539921, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (63539921) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 31769961 + 31769962.

It is an arithmetic number, because the mean of its divisors is an integer number (31769962).

Almost surely, 2^63539923 is an apocalyptic number.

63539923 is a deficient number, since it is larger than the sum of its proper divisors (1).

63539923 is an equidigital number, since it uses as much as digits as its factorization.

63539923 is an evil number, because the sum of its binary digits is even.

The product of its digits is 131220, while the sum is 40.

The square root of 63539923 is about 7971.1933234617. The cubic root of 63539923 is about 399.0392002574.

The spelling of 63539923 in words is "sixty-three million, five hundred thirty-nine thousand, nine hundred twenty-three".