64122889 has 2 divisors, whose sum is σ = 64122890. Its totient is φ = 64122888.

The previous prime is 64122881. The next prime is 64122901. The reversal of 64122889 is 98822146.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 56505289 + 7617600 = 7517^2 + 2760^2 .

It is a cyclic number.

It is not a de Polignac number, because 64122889 - 2³ = 64122881 is a prime.

It is a super-2 number, since 2×64122889² = 8223489787412642, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (64122881) 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, 32061444 + 32061445.

It is an arithmetic number, because the mean of its divisors is an integer number (32061445).

Almost surely, 2^64122889 is an apocalyptic number.

It is an amenable number.

64122889 is a deficient number, since it is larger than the sum of its proper divisors (1).

64122889 is an equidigital number, since it uses as much as digits as its factorization.

64122889 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 55296, while the sum is 40.

The square root of 64122889 is about 8007.6768790955. The cubic root of 64122889 is about 400.2558550606.

The spelling of 64122889 in words is "sixty-four million, one hundred twenty-two thousand, eight hundred eighty-nine".