63505247 has 4 divisors (see below), whose sum is σ = 68390280. Its totient is φ = 58620216.

The previous prime is 63505243. The next prime is 63505279. The reversal of 63505247 is 74250536.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 63505247 - 2² = 63505243 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (63505243) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2442497 + ... + 2442522.

It is an arithmetic number, because the mean of its divisors is an integer number (17097570).

Almost surely, 2^63505247 is an apocalyptic number.

63505247 is a deficient number, since it is larger than the sum of its proper divisors (4885033).

63505247 is a wasteful number, since it uses less digits than its factorization.

63505247 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4885032.

The product of its (nonzero) digits is 25200, while the sum is 32.

The square root of 63505247 is about 7969.0179445149. The cubic root of 63505247 is about 398.9665970785.

The spelling of 63505247 in words is "sixty-three million, five hundred five thousand, two hundred forty-seven".