71139654 has 16 divisors (see below), whose sum is σ = 158088240. Its totient is φ = 23713200.

The previous prime is 71139631. The next prime is 71139661. The reversal of 71139654 is 45693117.

It is a congruent number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 658647 + ... + 658754.

It is an arithmetic number, because the mean of its divisors is an integer number (9880515).

Almost surely, 2^71139654 is an apocalyptic number.

71139654 is an abundant number, since it is smaller than the sum of its proper divisors (86948586).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

71139654 is a wasteful number, since it uses less digits than its factorization.

71139654 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1317412 (or 1317406 counting only the distinct ones).

The product of its digits is 22680, while the sum is 36.

The square root of 71139654 is about 8434.4326424485. The cubic root of 71139654 is about 414.3530909159.

The spelling of 71139654 in words is "seventy-one million, one hundred thirty-nine thousand, six hundred fifty-four".