71463987 has 24 divisors (see below), whose sum is σ = 118609920. Its totient is φ = 40615920.

The previous prime is 71463949. The next prime is 71463989. The reversal of 71463987 is 78936417.

71463987 is a `hidden beast` number, since 7 + 1 + 4 + 639 + 8 + 7 = 666.

It is not a de Polignac number, because 71463987 - 2¹¹ = 71461939 is a prime.

It is not an unprimeable number, because it can be changed into a prime (71463989) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 9064 + ... + 15002.

It is an arithmetic number, because the mean of its divisors is an integer number (4942080).

Almost surely, 2^71463987 is an apocalyptic number.

71463987 is a deficient number, since it is larger than the sum of its proper divisors (47145933).

71463987 is a wasteful number, since it uses less digits than its factorization.

71463987 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6143 (or 6140 counting only the distinct ones).

The product of its digits is 254016, while the sum is 45.

The square root of 71463987 is about 8453.6375010997. The cubic root of 71463987 is about 414.9818291749.

The spelling of 71463987 in words is "seventy-one million, four hundred sixty-three thousand, nine hundred eighty-seven".