63613841 has 4 divisors (see below), whose sum is σ = 65333172. Its totient is φ = 61894512.

The previous prime is 63613831. The next prime is 63613853. The reversal of 63613841 is 14831636.

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

It can be written as a sum of positive squares in 2 ways, for example, as 44289025 + 19324816 = 6655^2 + 4396^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-63613841 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 63613798 and 63613807.

It is not an unprimeable number, because it can be changed into a prime (63613801) 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, 859610 + ... + 859683.

It is an arithmetic number, because the mean of its divisors is an integer number (16333293).

Almost surely, 2^63613841 is an apocalyptic number.

It is an amenable number.

63613841 is a deficient number, since it is larger than the sum of its proper divisors (1719331).

63613841 is a wasteful number, since it uses less digits than its factorization.

63613841 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1719330.

The product of its digits is 10368, while the sum is 32.

The square root of 63613841 is about 7975.8285463016. The cubic root of 63613841 is about 399.1938785954.

The spelling of 63613841 in words is "sixty-three million, six hundred thirteen thousand, eight hundred forty-one".