71478863 has 4 divisors (see below), whose sum is σ = 75683520. Its totient is φ = 67274208.

The previous prime is 71478851. The next prime is 71478887. The reversal of 71478863 is 36887417.

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 71478863 - 2¹⁰ = 71477839 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (71478163) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2102303 + ... + 2102336.

It is an arithmetic number, because the mean of its divisors is an integer number (18920880).

Almost surely, 2^71478863 is an apocalyptic number.

71478863 is a deficient number, since it is larger than the sum of its proper divisors (4204657).

71478863 is a wasteful number, since it uses less digits than its factorization.

71478863 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4204656.

The product of its digits is 225792, while the sum is 44.

The square root of 71478863 is about 8454.5173132474. The cubic root of 71478863 is about 415.0106214923.

The spelling of 71478863 in words is "seventy-one million, four hundred seventy-eight thousand, eight hundred sixty-three".