63721394 has 8 divisors (see below), whose sum is σ = 104271408. Its totient is φ = 28964260.

The previous prime is 63721391. The next prime is 63721403. The reversal of 63721394 is 49312736.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (63721391) 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, 1448192 + ... + 1448235.

It is an arithmetic number, because the mean of its divisors is an integer number (13033926).

Almost surely, 2^63721394 is an apocalyptic number.

63721394 is a deficient number, since it is larger than the sum of its proper divisors (40550014).

63721394 is a wasteful number, since it uses less digits than its factorization.

63721394 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2896440.

The product of its digits is 27216, while the sum is 35.

The square root of 63721394 is about 7982.5681331261. The cubic root of 63721394 is about 399.4187265454.

The spelling of 63721394 in words is "sixty-three million, seven hundred twenty-one thousand, three hundred ninety-four".