63995471 has 4 divisors (see below), whose sum is σ = 65080200. Its totient is φ = 62910744.

The previous prime is 63995447. The next prime is 63995473. The reversal of 63995471 is 17459936.

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 63995471 - 2¹⁴ = 63979087 is a prime.

It is a super-3 number, since 3×63995471³ (a number of 24 digits) contains 333 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (63995473) 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, 542276 + ... + 542393.

It is an arithmetic number, because the mean of its divisors is an integer number (16270050).

Almost surely, 2^63995471 is an apocalyptic number.

63995471 is a deficient number, since it is larger than the sum of its proper divisors (1084729).

63995471 is a wasteful number, since it uses less digits than its factorization.

63995471 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1084728.

The product of its digits is 204120, while the sum is 44.

The square root of 63995471 is about 7999.7169324920. The cubic root of 63995471 is about 399.9905643608.

The spelling of 63995471 in words is "sixty-three million, nine hundred ninety-five thousand, four hundred seventy-one".