71349861 has 16 divisors (see below), whose sum is σ = 104283648. Its totient is φ = 43033200.

The previous prime is 71349853. The next prime is 71349893. The reversal of 71349861 is 16894317.

It is not a de Polignac number, because 71349861 - 2³ = 71349853 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (71342861) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1840 + ... + 12086.

It is an arithmetic number, because the mean of its divisors is an integer number (6517728).

Almost surely, 2^71349861 is an apocalyptic number.

It is an amenable number.

71349861 is a deficient number, since it is larger than the sum of its proper divisors (32933787).

71349861 is a wasteful number, since it uses less digits than its factorization.

71349861 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10472.

The product of its digits is 36288, while the sum is 39.

The square root of 71349861 is about 8446.8846920033. The cubic root of 71349861 is about 414.7608066636.

The spelling of 71349861 in words is "seventy-one million, three hundred forty-nine thousand, eight hundred sixty-one".