63749623 has 4 divisors (see below), whose sum is σ = 72856720. Its totient is φ = 54642528.

The previous prime is 63749599. The next prime is 63749657. The reversal of 63749623 is 32694736.

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 63749623 - 2⁵ = 63749591 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 (63749663) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4553538 + ... + 4553551.

It is an arithmetic number, because the mean of its divisors is an integer number (18214180).

Almost surely, 2^63749623 is an apocalyptic number.

63749623 is a deficient number, since it is larger than the sum of its proper divisors (9107097).

63749623 is an equidigital number, since it uses as much as digits as its factorization.

63749623 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9107096.

The product of its digits is 163296, while the sum is 40.

The square root of 63749623 is about 7984.3361026450. The cubic root of 63749623 is about 399.4776995524.

The spelling of 63749623 in words is "sixty-three million, seven hundred forty-nine thousand, six hundred twenty-three".