71061013 has 4 divisors (see below), whose sum is σ = 71105260. Its totient is φ = 71016768.

The previous prime is 71060993. The next prime is 71061041. The reversal of 71061013 is 31016017.

It is a happy number.

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 53100369 + 17960644 = 7287^2 + 4238^2 .

It is a cyclic number.

It is not a de Polignac number, because 71061013 - 2¹⁷ = 70929941 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 (71061113) 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, 19620 + ... + 22957.

It is an arithmetic number, because the mean of its divisors is an integer number (17776315).

Almost surely, 2^71061013 is an apocalyptic number.

It is an amenable number.

71061013 is a deficient number, since it is larger than the sum of its proper divisors (44247).

71061013 is a wasteful number, since it uses less digits than its factorization.

71061013 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 44246.

The product of its (nonzero) digits is 126, while the sum is 19.

The square root of 71061013 is about 8429.7694511772. The cubic root of 71061013 is about 414.2003530545.

The spelling of 71061013 in words is "seventy-one million, sixty-one thousand, thirteen".