71580949 has 4 divisors (see below), whose sum is σ = 78088320. Its totient is φ = 65073580.

The previous prime is 71580937. The next prime is 71580959. The reversal of 71580949 is 94908517.

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.

It is not a de Polignac number, because 71580949 - 2⁵ = 71580917 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 (71580919) 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, 3253669 + ... + 3253690.

It is an arithmetic number, because the mean of its divisors is an integer number (19522080).

Almost surely, 2^71580949 is an apocalyptic number.

It is an amenable number.

71580949 is a deficient number, since it is larger than the sum of its proper divisors (6507371).

71580949 is a wasteful number, since it uses less digits than its factorization.

71580949 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6507370.

The product of its (nonzero) digits is 90720, while the sum is 43.

The square root of 71580949 is about 8460.5525233285. The cubic root of 71580949 is about 415.2081000155.

The spelling of 71580949 in words is "seventy-one million, five hundred eighty thousand, nine hundred forty-nine".