71472971 has 4 divisors (see below), whose sum is σ = 71491032. Its totient is φ = 71454912.

The previous prime is 71472967. The next prime is 71472997. The reversal of 71472971 is 17927417.

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 71472971 - 2² = 71472967 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (71472901) 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, 245 + ... + 11958.

It is an arithmetic number, because the mean of its divisors is an integer number (17872758).

Almost surely, 2^71472971 is an apocalyptic number.

71472971 is a deficient number, since it is larger than the sum of its proper divisors (18061).

71472971 is a wasteful number, since it uses less digits than its factorization.

71472971 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18060.

The product of its digits is 24696, while the sum is 38.

The square root of 71472971 is about 8454.1688532936. The cubic root of 71472971 is about 414.9992180757. Note that the first 3 decimals are identical.

The spelling of 71472971 in words is "seventy-one million, four hundred seventy-two thousand, nine hundred seventy-one".