73969891 has 2 divisors, whose sum is σ = 73969892. Its totient is φ = 73969890.

The previous prime is 73969879. The next prime is 73969897. The reversal of 73969891 is 19896937.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 73969891 - 2¹⁷ = 73838819 is a prime.

It is not a weakly prime, because it can be changed into another prime (73969897) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36984945 + 36984946.

It is an arithmetic number, because the mean of its divisors is an integer number (36984946).

Almost surely, 2^73969891 is an apocalyptic number.

73969891 is a deficient number, since it is larger than the sum of its proper divisors (1).

73969891 is an equidigital number, since it uses as much as digits as its factorization.

73969891 is an evil number, because the sum of its binary digits is even.

The product of its digits is 734832, while the sum is 52.

The square root of 73969891 is about 8600.5750389145. The cubic root of 73969891 is about 419.7766972455.

The spelling of 73969891 in words is "seventy-three million, nine hundred sixty-nine thousand, eight hundred ninety-one".