63691372 has 12 divisors (see below), whose sum is σ = 113563296. Its totient is φ = 31244720.

The previous prime is 63691357. The next prime is 63691373. The reversal of 63691372 is 27319636.

It is not an unprimeable number, because it can be changed into a prime (63691373) 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, 150004 + ... + 150427.

It is an arithmetic number, because the mean of its divisors is an integer number (9463608).

Almost surely, 2^63691372 is an apocalyptic number.

It is an amenable number.

63691372 is a deficient number, since it is larger than the sum of its proper divisors (49871924).

63691372 is a wasteful number, since it uses less digits than its factorization.

63691372 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 300488 (or 300486 counting only the distinct ones).

The product of its digits is 40824, while the sum is 37.

The square root of 63691372 is about 7980.6874390619. The cubic root of 63691372 is about 399.3559886800.

The spelling of 63691372 in words is "sixty-three million, six hundred ninety-one thousand, three hundred seventy-two".