63721442 has 16 divisors (see below), whose sum is σ = 98128800. Its totient is φ = 31016832.

The previous prime is 63721417. The next prime is 63721447. The reversal of 63721442 is 24412736.

It is not an unprimeable number, because it can be changed into a prime (63721447) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 29309 + ... + 31407.

It is an arithmetic number, because the mean of its divisors is an integer number (6133050).

Almost surely, 2^63721442 is an apocalyptic number.

63721442 is a deficient number, since it is larger than the sum of its proper divisors (34407358).

63721442 is a wasteful number, since it uses less digits than its factorization.

63721442 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2497.

The product of its digits is 8064, while the sum is 29.

The square root of 63721442 is about 7982.5711396767. The cubic root of 63721442 is about 399.4188268367.

The spelling of 63721442 in words is "sixty-three million, seven hundred twenty-one thousand, four hundred forty-two".