71786013 has 32 divisors (see below), whose sum is σ = 108380160. Its totient is φ = 41933760.

The previous prime is 71785997. The next prime is 71786023. The reversal of 71786013 is 31068717.

It is not a de Polignac number, because 71786013 - 2⁴ = 71785997 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (71786023) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 171118 + ... + 171536.

It is an arithmetic number, because the mean of its divisors is an integer number (3386880).

Almost surely, 2^71786013 is an apocalyptic number.

It is an amenable number.

71786013 is a deficient number, since it is larger than the sum of its proper divisors (36594147).

71786013 is a wasteful number, since it uses less digits than its factorization.

71786013 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 649.

The product of its (nonzero) digits is 7056, while the sum is 33.

The square root of 71786013 is about 8472.6626865467. The cubic root of 71786013 is about 415.6042159166.

The spelling of 71786013 in words is "seventy-one million, seven hundred eighty-six thousand, thirteen".