63439393 has 8 divisors (see below), whose sum is σ = 67251168. Its totient is φ = 59636544.

The previous prime is 63439381. The next prime is 63439399. The reversal of 63439393 is 39393436.

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

It is not a de Polignac number, because 63439393 - 2¹⁷ = 63308321 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (63439399) 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, 17430 + ... + 20752.

It is an arithmetic number, because the mean of its divisors is an integer number (8406396).

Almost surely, 2^63439393 is an apocalyptic number.

It is an amenable number.

63439393 is a deficient number, since it is larger than the sum of its proper divisors (3811775).

63439393 is a wasteful number, since it uses less digits than its factorization.

63439393 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4463.

The product of its digits is 157464, while the sum is 40.

The square root of 63439393 is about 7964.8849960310. The cubic root of 63439393 is about 398.8286418988.

The spelling of 63439393 in words is "sixty-three million, four hundred thirty-nine thousand, three hundred ninety-three".