63639349 has 4 divisors (see below), whose sum is σ = 63656064. Its totient is φ = 63622636.

The previous prime is 63639281. The next prime is 63639383. The reversal of 63639349 is 94393636.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 63639349 - 2¹⁹ = 63115061 is a prime.

It is a super-2 number, since 2×63639349² = 8099933482287602, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (63639049) 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, 444 + ... + 11290.

It is an arithmetic number, because the mean of its divisors is an integer number (15914016).

Almost surely, 2^63639349 is an apocalyptic number.

It is an amenable number.

63639349 is a deficient number, since it is larger than the sum of its proper divisors (16715).

63639349 is a wasteful number, since it uses less digits than its factorization.

63639349 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16714.

The product of its digits is 314928, while the sum is 43.

The square root of 63639349 is about 7977.4274675487. The cubic root of 63639349 is about 399.2472279744.

The spelling of 63639349 in words is "sixty-three million, six hundred thirty-nine thousand, three hundred forty-nine".