71005197 has 4 divisors (see below), whose sum is σ = 94673600. Its totient is φ = 47336796.

The previous prime is 71005189. The next prime is 71005201. The reversal of 71005197 is 79150017.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 79150017 = 3 ⋅26383339.

It is not a de Polignac number, because 71005197 - 2³ = 71005189 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 (71005397) 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, 11834197 + ... + 11834202.

It is an arithmetic number, because the mean of its divisors is an integer number (23668400).

Almost surely, 2^71005197 is an apocalyptic number.

It is an amenable number.

71005197 is a deficient number, since it is larger than the sum of its proper divisors (23668403).

71005197 is a wasteful number, since it uses less digits than its factorization.

71005197 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23668402.

The product of its (nonzero) digits is 2205, while the sum is 30.

The square root of 71005197 is about 8426.4581527472. The cubic root of 71005197 is about 414.0918779023.

The spelling of 71005197 in words is "seventy-one million, five thousand, one hundred ninety-seven".