71534863 has 4 divisors (see below), whose sum is σ = 71672688. Its totient is φ = 71397040.

The previous prime is 71534833. The next prime is 71534917. The reversal of 71534863 is 36843517.

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 71534863 - 2⁵ = 71534831 is a prime.

It is a super-4 number, since 4×71534863⁴ (a number of 33 digits) contains 4444 as substring. Note that it is a super-d number also for d = 3.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (71534803) 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 3 ways as a sum of consecutive naturals, for example, 68131 + ... + 69172.

It is an arithmetic number, because the mean of its divisors is an integer number (17918172).

Almost surely, 2^71534863 is an apocalyptic number.

71534863 is a deficient number, since it is larger than the sum of its proper divisors (137825).

71534863 is a wasteful number, since it uses less digits than its factorization.

71534863 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 137824.

The product of its digits is 60480, while the sum is 37.

The square root of 71534863 is about 8457.8285038182. The cubic root of 71534863 is about 415.1189730021.

The spelling of 71534863 in words is "seventy-one million, five hundred thirty-four thousand, eight hundred sixty-three".