63991274 has 8 divisors (see below), whose sum is σ = 96206880. Its totient is φ = 31922316.

The previous prime is 63991253. The next prime is 63991307. The reversal of 63991274 is 47219936.

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

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 35564 + ... + 37319.

It is an arithmetic number, because the mean of its divisors is an integer number (12025860).

Almost surely, 2^63991274 is an apocalyptic number.

63991274 is a deficient number, since it is larger than the sum of its proper divisors (32215606).

63991274 is a wasteful number, since it uses less digits than its factorization.

63991274 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 73324.

The product of its digits is 81648, while the sum is 41.

The square root of 63991274 is about 7999.4546064091. The cubic root of 63991274 is about 399.9818200071.

The spelling of 63991274 in words is "sixty-three million, nine hundred ninety-one thousand, two hundred seventy-four".