73726591 has 2 divisors, whose sum is σ = 73726592. Its totient is φ = 73726590.

The previous prime is 73726589. The next prime is 73726663. The reversal of 73726591 is 19562737.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 73726591 - 2¹ = 73726589 is a prime.

It is a super-2 number, since 2×73726591² = 10871220440962562, which contains 22 as substring.

Together with 73726589, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (73726571) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36863295 + 36863296.

It is an arithmetic number, because the mean of its divisors is an integer number (36863296).

Almost surely, 2^73726591 is an apocalyptic number.

73726591 is a deficient number, since it is larger than the sum of its proper divisors (1).

73726591 is an equidigital number, since it uses as much as digits as its factorization.

73726591 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 79380, while the sum is 40.

The square root of 73726591 is about 8586.4189858171. The cubic root of 73726591 is about 419.3159518870.

The spelling of 73726591 in words is "seventy-three million, seven hundred twenty-six thousand, five hundred ninety-one".