71845097 has 4 divisors (see below), whose sum is σ = 71947140. Its totient is φ = 71743056.

The previous prime is 71845091. The next prime is 71845133. The reversal of 71845097 is 79054817.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 36192256 + 35652841 = 6016^2 + 5971^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-71845097 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (71845091) 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, 49958 + ... + 51375.

It is an arithmetic number, because the mean of its divisors is an integer number (17986785).

Almost surely, 2^71845097 is an apocalyptic number.

It is an amenable number.

71845097 is a deficient number, since it is larger than the sum of its proper divisors (102043).

71845097 is a wasteful number, since it uses less digits than its factorization.

71845097 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 102042.

The product of its (nonzero) digits is 70560, while the sum is 41.

The square root of 71845097 is about 8476.1487127115. The cubic root of 71845097 is about 415.7182066727.

The spelling of 71845097 in words is "seventy-one million, eight hundred forty-five thousand, ninety-seven".