61384663 has 4 divisors (see below), whose sum is σ = 62300920. Its totient is φ = 60468408.

The previous prime is 61384657. The next prime is 61384699. The reversal of 61384663 is 36648316.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-61384663 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 (61384613) 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, 458028 + ... + 458161.

It is an arithmetic number, because the mean of its divisors is an integer number (15575230).

Almost surely, 2^61384663 is an apocalyptic number.

61384663 is a deficient number, since it is larger than the sum of its proper divisors (916257).

61384663 is an equidigital number, since it uses as much as digits as its factorization.

61384663 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 916256.

The product of its digits is 62208, while the sum is 37.

The square root of 61384663 is about 7834.8365011658. The cubic root of 61384663 is about 394.4754303562.

It can be divided in two parts, 6138 and 4663, that added together give a palindrome (10801).

The spelling of 61384663 in words is "sixty-one million, three hundred eighty-four thousand, six hundred sixty-three".