73941991 has 2 divisors, whose sum is σ = 73941992. Its totient is φ = 73941990.

The previous prime is 73941979. The next prime is 73942007. The reversal of 73941991 is 19914937.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-73941991 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (73944991) 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, 36970995 + 36970996.

It is an arithmetic number, because the mean of its divisors is an integer number (36970996).

Almost surely, 2^73941991 is an apocalyptic number.

73941991 is a deficient number, since it is larger than the sum of its proper divisors (1).

73941991 is an equidigital number, since it uses as much as digits as its factorization.

73941991 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 61236, while the sum is 43.

The square root of 73941991 is about 8598.9529013712. The cubic root of 73941991 is about 419.7239134147.

The spelling of 73941991 in words is "seventy-three million, nine hundred forty-one thousand, nine hundred ninety-one".