71770071 has 4 divisors (see below), whose sum is σ = 95693432. Its totient is φ = 47846712.

The previous prime is 71770067. The next prime is 71770103. The reversal of 71770071 is 17007717.

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

It is not a de Polignac number, because 71770071 - 2² = 71770067 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 (71770031) 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, 11961676 + ... + 11961681.

It is an arithmetic number, because the mean of its divisors is an integer number (23923358).

Almost surely, 2^71770071 is an apocalyptic number.

71770071 is a deficient number, since it is larger than the sum of its proper divisors (23923361).

71770071 is a wasteful number, since it uses less digits than its factorization.

71770071 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23923360.

The product of its (nonzero) digits is 2401, while the sum is 30.

The square root of 71770071 is about 8471.7218438757. The cubic root of 71770071 is about 415.5734483030.

Adding to 71770071 its reverse (17007717), we get a palindrome (88777788).

The spelling of 71770071 in words is "seventy-one million, seven hundred seventy thousand, seventy-one".