63939523 has 2 divisors, whose sum is σ = 63939524. Its totient is φ = 63939522.

The previous prime is 63939497. The next prime is 63939553. The reversal of 63939523 is 32593936.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 63939523 - 2²¹ = 61842371 is a prime.

It is not a weakly prime, because it can be changed into another prime (63939553) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 31969761 + 31969762.

It is an arithmetic number, because the mean of its divisors is an integer number (31969762).

Almost surely, 2^63939523 is an apocalyptic number.

63939523 is a deficient number, since it is larger than the sum of its proper divisors (1).

63939523 is an equidigital number, since it uses as much as digits as its factorization.

63939523 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 63939523 is about 7996.2192941415. The cubic root of 63939523 is about 399.8739665431.

The spelling of 63939523 in words is "sixty-three million, nine hundred thirty-nine thousand, five hundred twenty-three".