63840499 has 2 divisors, whose sum is σ = 63840500. Its totient is φ = 63840498.

The previous prime is 63840473. The next prime is 63840527. The reversal of 63840499 is 99404836.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 63840499 - 2⁹ = 63839987 is a prime.

It is not a weakly prime, because it can be changed into another prime (63840409) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 31920249 + 31920250.

It is an arithmetic number, because the mean of its divisors is an integer number (31920250).

Almost surely, 2^63840499 is an apocalyptic number.

63840499 is a deficient number, since it is larger than the sum of its proper divisors (1).

63840499 is an equidigital number, since it uses as much as digits as its factorization.

63840499 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 186624, while the sum is 43.

The square root of 63840499 is about 7990.0249686719. The cubic root of 63840499 is about 399.6674298193.

The spelling of 63840499 in words is "sixty-three million, eight hundred forty thousand, four hundred ninety-nine".