74559889 has 2 divisors, whose sum is σ = 74559890. Its totient is φ = 74559888.

The previous prime is 74559887. The next prime is 74559913. The reversal of 74559889 is 98895547.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 73393489 + 1166400 = 8567^2 + 1080^2 .

It is an emirp because it is prime and its reverse (98895547) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 74559889 - 2¹ = 74559887 is a prime.

Together with 74559887, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (74559887) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 37279944 + 37279945.

It is an arithmetic number, because the mean of its divisors is an integer number (37279945).

Almost surely, 2^74559889 is an apocalyptic number.

It is an amenable number.

74559889 is a deficient number, since it is larger than the sum of its proper divisors (1).

74559889 is an equidigital number, since it uses as much as digits as its factorization.

74559889 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3628800, while the sum is 55.

The square root of 74559889 is about 8634.8068304971. The cubic root of 74559889 is about 420.8898160657.

The spelling of 74559889 in words is "seventy-four million, five hundred fifty-nine thousand, eight hundred eighty-nine".