64980089 has 2 divisors, whose sum is σ = 64980090. Its totient is φ = 64980088.

The previous prime is 64980079. The next prime is 64980131. The reversal of 64980089 is 98008946.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 64722025 + 258064 = 8045^2 + 508^2 .

It is a cyclic number.

It is not a de Polignac number, because 64980089 - 2⁴ = 64980073 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (64980079) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32490044 + 32490045.

It is an arithmetic number, because the mean of its divisors is an integer number (32490045).

Almost surely, 2^64980089 is an apocalyptic number.

It is an amenable number.

64980089 is a deficient number, since it is larger than the sum of its proper divisors (1).

64980089 is an equidigital number, since it uses as much as digits as its factorization.

64980089 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 124416, while the sum is 44.

The square root of 64980089 is about 8061.0228259198. The cubic root of 64980089 is about 402.0315169633.

The spelling of 64980089 in words is "sixty-four million, nine hundred eighty thousand, eighty-nine".