71500943 has 4 divisors (see below), whose sum is σ = 71808048. Its totient is φ = 71193840.

The previous prime is 71500939. The next prime is 71500981. The reversal of 71500943 is 34900517.

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 71500943 - 2² = 71500939 is a prime.

It is a super-2 number, since 2×71500943² = 10224769699778498, which contains 22 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 (76500943) 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, 153203 + ... + 153668.

It is an arithmetic number, because the mean of its divisors is an integer number (17952012).

Almost surely, 2^71500943 is an apocalyptic number.

71500943 is a deficient number, since it is larger than the sum of its proper divisors (307105).

71500943 is a wasteful number, since it uses less digits than its factorization.

71500943 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 307104.

The product of its (nonzero) digits is 3780, while the sum is 29.

The square root of 71500943 is about 8455.8230232190. The cubic root of 71500943 is about 415.0533497002.

The spelling of 71500943 in words is "seventy-one million, five hundred thousand, nine hundred forty-three".