71012197 has 4 divisors (see below), whose sum is σ = 71068000. Its totient is φ = 70956396.

The previous prime is 71012189. The next prime is 71012203. The reversal of 71012197 is 79121017.

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: 79121017 = 4481 ⋅17657.

It is a cyclic number.

It is not a de Polignac number, because 71012197 - 2³ = 71012189 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 (71012107) 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, 25947 + ... + 28552.

It is an arithmetic number, because the mean of its divisors is an integer number (17767000).

Almost surely, 2^71012197 is an apocalyptic number.

It is an amenable number.

71012197 is a deficient number, since it is larger than the sum of its proper divisors (55803).

71012197 is a wasteful number, since it uses less digits than its factorization.

71012197 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 55802.

The product of its (nonzero) digits is 882, while the sum is 28.

The square root of 71012197 is about 8426.8735008899. The cubic root of 71012197 is about 414.1054851124.

The spelling of 71012197 in words is "seventy-one million, twelve thousand, one hundred ninety-seven".