74222989 has 2 divisors, whose sum is σ = 74222990. Its totient is φ = 74222988.

The previous prime is 74222971. The next prime is 74223077. The reversal of 74222989 is 98922247.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 67158025 + 7064964 = 8195^2 + 2658^2 .

It is a cyclic number.

It is not a de Polignac number, because 74222989 - 2⁵ = 74222957 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (74220989) 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, 37111494 + 37111495.

It is an arithmetic number, because the mean of its divisors is an integer number (37111495).

Almost surely, 2^74222989 is an apocalyptic number.

It is an amenable number.

74222989 is a deficient number, since it is larger than the sum of its proper divisors (1).

74222989 is an equidigital number, since it uses as much as digits as its factorization.

74222989 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 145152, while the sum is 43.

The square root of 74222989 is about 8615.2764900495. The cubic root of 74222989 is about 420.2549264912.

The spelling of 74222989 in words is "seventy-four million, two hundred twenty-two thousand, nine hundred eighty-nine".