73122391 has 2 divisors, whose sum is σ = 73122392. Its totient is φ = 73122390.

The previous prime is 73122377. The next prime is 73122407. The reversal of 73122391 is 19322137.

It is a weak prime.

It is an emirp because it is prime and its reverse (19322137) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 73122391 - 2¹⁹ = 72598103 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (73122331) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36561195 + 36561196.

It is an arithmetic number, because the mean of its divisors is an integer number (36561196).

Almost surely, 2^73122391 is an apocalyptic number.

73122391 is a deficient number, since it is larger than the sum of its proper divisors (1).

73122391 is an equidigital number, since it uses as much as digits as its factorization.

73122391 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2268, while the sum is 28.

The square root of 73122391 is about 8551.1631372580. The cubic root of 73122391 is about 418.1673570370.

The spelling of 73122391 in words is "seventy-three million, one hundred twenty-two thousand, three hundred ninety-one".