73867891 has 2 divisors, whose sum is σ = 73867892. Its totient is φ = 73867890.

The previous prime is 73867853. The next prime is 73867919. The reversal of 73867891 is 19876837.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 73867891 - 2²³ = 65479283 is a prime.

It is not a weakly prime, because it can be changed into another prime (73867831) 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, 36933945 + 36933946.

It is an arithmetic number, because the mean of its divisors is an integer number (36933946).

Almost surely, 2^73867891 is an apocalyptic number.

73867891 is a deficient number, since it is larger than the sum of its proper divisors (1).

73867891 is an equidigital number, since it uses as much as digits as its factorization.

73867891 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 508032, while the sum is 49.

The square root of 73867891 is about 8594.6431572230. The cubic root of 73867891 is about 419.5836596081.

The spelling of 73867891 in words is "seventy-three million, eight hundred sixty-seven thousand, eight hundred ninety-one".