71084549 has 4 divisors (see below), whose sum is σ = 71117280. Its totient is φ = 71051820.

The previous prime is 71084543. The next prime is 71084551. The reversal of 71084549 is 94548017.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 94548017 = 109 ⋅867413.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-71084549 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 (71084543) 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 3 ways as a sum of consecutive naturals, for example, 12857 + ... + 17534.

It is an arithmetic number, because the mean of its divisors is an integer number (17779320).

Almost surely, 2^71084549 is an apocalyptic number.

It is an amenable number.

71084549 is a deficient number, since it is larger than the sum of its proper divisors (32731).

71084549 is a wasteful number, since it uses less digits than its factorization.

71084549 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32730.

The product of its (nonzero) digits is 40320, while the sum is 38.

The square root of 71084549 is about 8431.1653405683. The cubic root of 71084549 is about 414.2460768770.

The spelling of 71084549 in words is "seventy-one million, eighty-four thousand, five hundred forty-nine".