63338991 has 8 divisors (see below), whose sum is σ = 89419824. Its totient is φ = 39742080.

The previous prime is 63338927. The next prime is 63338999. The reversal of 63338991 is 19983336.

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

It is not a de Polignac number, because 63338991 - 2⁶ = 63338927 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (63338999) 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, 620920 + ... + 621021.

It is an arithmetic number, because the mean of its divisors is an integer number (11177478).

Almost surely, 2^63338991 is an apocalyptic number.

63338991 is a deficient number, since it is larger than the sum of its proper divisors (26080833).

63338991 is a wasteful number, since it uses less digits than its factorization.

63338991 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1241961.

The product of its digits is 104976, while the sum is 42.

The square root of 63338991 is about 7958.5797099734. The cubic root of 63338991 is about 398.6181294989.

The spelling of 63338991 in words is "sixty-three million, three hundred thirty-eight thousand, nine hundred ninety-one".