63491992 has 16 divisors (see below), whose sum is σ = 119390040. Its totient is φ = 31654656.

The previous prime is 63491941. The next prime is 63491993. The reversal of 63491992 is 29919436.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (63491993) 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, 8418 + ... + 14065.

Almost surely, 2^63491992 is an apocalyptic number.

It is an amenable number.

63491992 is a deficient number, since it is larger than the sum of its proper divisors (55898048).

63491992 is a wasteful number, since it uses less digits than its factorization.

63491992 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22842 (or 22838 counting only the distinct ones).

The product of its digits is 104976, while the sum is 43.

The square root of 63491992 is about 7968.1862428033. The cubic root of 63491992 is about 398.9388373239.

The spelling of 63491992 in words is "sixty-three million, four hundred ninety-one thousand, nine hundred ninety-two".