71074991 has 16 divisors (see below), whose sum is σ = 84080640. Its totient is φ = 59447520.

The previous prime is 71074987. The next prime is 71075021. The reversal of 71074991 is 19947017.

It is a cyclic number.

It is not a de Polignac number, because 71074991 - 2² = 71074987 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (71074901) 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 15 ways as a sum of consecutive naturals, for example, 575 + ... + 11936.

It is an arithmetic number, because the mean of its divisors is an integer number (5255040).

Almost surely, 2^71074991 is an apocalyptic number.

71074991 is a deficient number, since it is larger than the sum of its proper divisors (13005649).

71074991 is a wasteful number, since it uses less digits than its factorization.

71074991 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12566.

The product of its (nonzero) digits is 15876, while the sum is 38.

The square root of 71074991 is about 8430.5984959551. The cubic root of 71074991 is about 414.2275095909.

The spelling of 71074991 in words is "seventy-one million, seventy-four thousand, nine hundred ninety-one".