71409611 has 12 divisors (see below), whose sum is σ = 89458992. Its totient is φ = 56499408.

The previous prime is 71409587. The next prime is 71409617. The reversal of 71409611 is 11690417.

It is a de Polignac number, because none of the positive numbers 2^k-71409611 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (71409617) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 55415 + ... + 56688.

It is an arithmetic number, because the mean of its divisors is an integer number (7454916).

Almost surely, 2^71409611 is an apocalyptic number.

71409611 is a deficient number, since it is larger than the sum of its proper divisors (18049381).

71409611 is a wasteful number, since it uses less digits than its factorization.

71409611 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 112130 (or 112123 counting only the distinct ones).

The product of its (nonzero) digits is 1512, while the sum is 29.

The square root of 71409611 is about 8450.4207587552. The cubic root of 71409611 is about 414.8765510786.

The spelling of 71409611 in words is "seventy-one million, four hundred nine thousand, six hundred eleven".