71149091 has 8 divisors (see below), whose sum is σ = 80655120. Its totient is φ = 62219232.

The previous prime is 71149087. The next prime is 71149157. The reversal of 71149091 is 19094117.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 71149091 - 2² = 71149087 is a prime.

It is not an unprimeable number, because it can be changed into a prime (71149021) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 143780 + ... + 144273.

It is an arithmetic number, because the mean of its divisors is an integer number (10081890).

Almost surely, 2^71149091 is an apocalyptic number.

71149091 is a deficient number, since it is larger than the sum of its proper divisors (9506029).

71149091 is a wasteful number, since it uses less digits than its factorization.

71149091 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 288085.

The product of its (nonzero) digits is 2268, while the sum is 32.

The square root of 71149091 is about 8434.9920569020. The cubic root of 71149091 is about 414.3714120491.

The spelling of 71149091 in words is "seventy-one million, one hundred forty-nine thousand, ninety-one".