73722391 has 2 divisors, whose sum is σ = 73722392. Its totient is φ = 73722390.

The previous prime is 73722377. The next prime is 73722401. The reversal of 73722391 is 19322737.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 73722391 - 2⁵ = 73722359 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (73722301) 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, 36861195 + 36861196.

It is an arithmetic number, because the mean of its divisors is an integer number (36861196).

Almost surely, 2^73722391 is an apocalyptic number.

73722391 is a deficient number, since it is larger than the sum of its proper divisors (1).

73722391 is an equidigital number, since it uses as much as digits as its factorization.

73722391 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 15876, while the sum is 34.

The square root of 73722391 is about 8586.1744100618. The cubic root of 73722391 is about 419.3079893124.

The spelling of 73722391 in words is "seventy-three million, seven hundred twenty-two thousand, three hundred ninety-one".