74220917 has 2 divisors, whose sum is σ = 74220918. Its totient is φ = 74220916.

The previous prime is 74220911. The next prime is 74220953. The reversal of 74220917 is 71902247.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 73376356 + 844561 = 8566^2 + 919^2 .

It is an emirp because it is prime and its reverse (71902247) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 74220917 - 2⁴ = 74220901 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (74220911) 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, 37110458 + 37110459.

It is an arithmetic number, because the mean of its divisors is an integer number (37110459).

Almost surely, 2^74220917 is an apocalyptic number.

It is an amenable number.

74220917 is a deficient number, since it is larger than the sum of its proper divisors (1).

74220917 is an equidigital number, since it uses as much as digits as its factorization.

74220917 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 7056, while the sum is 32.

The square root of 74220917 is about 8615.1562377011. The cubic root of 74220917 is about 420.2510158596.

The spelling of 74220917 in words is "seventy-four million, two hundred twenty thousand, nine hundred seventeen".