63493691 has 8 divisors (see below), whose sum is σ = 67573440. Its totient is φ = 59452288.

The previous prime is 63493679. The next prime is 63493697. The reversal of 63493691 is 19639436.

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

It is a cyclic number.

It is not a de Polignac number, because 63493691 - 2¹⁸ = 63231547 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (63493697) 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, 6131 + ... + 12828.

It is an arithmetic number, because the mean of its divisors is an integer number (8446680).

Almost surely, 2^63493691 is an apocalyptic number.

63493691 is a deficient number, since it is larger than the sum of its proper divisors (4079749).

63493691 is a wasteful number, since it uses less digits than its factorization.

63493691 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19173.

The product of its digits is 104976, while the sum is 41.

The square root of 63493691 is about 7968.2928535540. The cubic root of 63493691 is about 398.9423957309.

The spelling of 63493691 in words is "sixty-three million, four hundred ninety-three thousand, six hundred ninety-one".