63478491 has 8 divisors (see below), whose sum is σ = 86025744. Its totient is φ = 41625120.

The previous prime is 63478489. The next prime is 63478523. The reversal of 63478491 is 19487436.

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

It is not a de Polignac number, because 63478491 - 2¹ = 63478489 is a prime.

It is not an unprimeable number, because it can be changed into a prime (63478451) 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, 173256 + ... + 173621.

It is an arithmetic number, because the mean of its divisors is an integer number (10753218).

Almost surely, 2^63478491 is an apocalyptic number.

63478491 is a gapful number since it is divisible by the number (61) formed by its first and last digit.

63478491 is a deficient number, since it is larger than the sum of its proper divisors (22547253).

63478491 is a wasteful number, since it uses less digits than its factorization.

63478491 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 346941.

The product of its digits is 145152, while the sum is 42.

The square root of 63478491 is about 7967.3390162588. The cubic root of 63478491 is about 398.9105584030.

The spelling of 63478491 in words is "sixty-three million, four hundred seventy-eight thousand, four hundred ninety-one".