63972331 has 4 divisors (see below), whose sum is σ = 64294000. Its totient is φ = 63650664.

The previous prime is 63972329. The next prime is 63972367. The reversal of 63972331 is 13327936.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 63972331 - 2¹ = 63972329 is a prime.

It is a super-2 number, since 2×63972331² = 8184918267147122, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (63972731) 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, 160536 + ... + 160933.

It is an arithmetic number, because the mean of its divisors is an integer number (16073500).

Almost surely, 2^63972331 is an apocalyptic number.

63972331 is a deficient number, since it is larger than the sum of its proper divisors (321669).

63972331 is a wasteful number, since it uses less digits than its factorization.

63972331 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 321668.

The product of its digits is 20412, while the sum is 34.

The square root of 63972331 is about 7998.2705005520. The cubic root of 63972331 is about 399.9423479410.

The spelling of 63972331 in words is "sixty-three million, nine hundred seventy-two thousand, three hundred thirty-one".