71049071 has 4 divisors (see below), whose sum is σ = 71253000. Its totient is φ = 70845144.

The previous prime is 71049067. The next prime is 71049073. The reversal of 71049071 is 17094017.

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 71049071 - 2² = 71049067 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 (71049073) 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, 101441 + ... + 102138.

It is an arithmetic number, because the mean of its divisors is an integer number (17813250).

Almost surely, 2^71049071 is an apocalyptic number.

71049071 is a deficient number, since it is larger than the sum of its proper divisors (203929).

71049071 is a wasteful number, since it uses less digits than its factorization.

71049071 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 203928.

The product of its (nonzero) digits is 1764, while the sum is 29.

The square root of 71049071 is about 8429.0610983668. The cubic root of 71049071 is about 414.1771492493.

The spelling of 71049071 in words is "seventy-one million, forty-nine thousand, seventy-one".