74289289 has 2 divisors, whose sum is σ = 74289290. Its totient is φ = 74289288.

The previous prime is 74289283. The next prime is 74289307. The reversal of 74289289 is 98298247.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 50523664 + 23765625 = 7108^2 + 4875^2 .

It is a cyclic number.

It is not a de Polignac number, because 74289289 - 2⁷ = 74289161 is a prime.

It is not a weakly prime, because it can be changed into another prime (74289283) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 37144644 + 37144645.

It is an arithmetic number, because the mean of its divisors is an integer number (37144645).

Almost surely, 2^74289289 is an apocalyptic number.

It is an amenable number.

74289289 is a deficient number, since it is larger than the sum of its proper divisors (1).

74289289 is an equidigital number, since it uses as much as digits as its factorization.

74289289 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 580608, while the sum is 49.

The square root of 74289289 is about 8619.1234473118. The cubic root of 74289289 is about 420.3800207507.

The spelling of 74289289 in words is "seventy-four million, two hundred eighty-nine thousand, two hundred eighty-nine".