73971791 has 2 divisors, whose sum is σ = 73971792. Its totient is φ = 73971790.

The previous prime is 73971787. The next prime is 73971803. The reversal of 73971791 is 19717937.

It is a happy number.

It is a weak prime.

It is an emirp because it is prime and its reverse (19717937) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 73971791 - 2² = 73971787 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (73971761) 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 as a sum of consecutive naturals, namely, 36985895 + 36985896.

It is an arithmetic number, because the mean of its divisors is an integer number (36985896).

Almost surely, 2^73971791 is an apocalyptic number.

73971791 is a deficient number, since it is larger than the sum of its proper divisors (1).

73971791 is an equidigital number, since it uses as much as digits as its factorization.

73971791 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 83349, while the sum is 44.

The square root of 73971791 is about 8600.6854959358. The cubic root of 73971791 is about 419.7802913606.

The spelling of 73971791 in words is "seventy-three million, nine hundred seventy-one thousand, seven hundred ninety-one".