64145189 has 2 divisors, whose sum is σ = 64145190. Its totient is φ = 64145188.

The previous prime is 64145143. The next prime is 64145203. The reversal of 64145189 is 98154146.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 56400100 + 7745089 = 7510^2 + 2783^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-64145189 is a prime.

It is a super-2 number, since 2×64145189² = 8229210543691442, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (64145119) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32072594 + 32072595.

It is an arithmetic number, because the mean of its divisors is an integer number (32072595).

Almost surely, 2^64145189 is an apocalyptic number.

It is an amenable number.

64145189 is a deficient number, since it is larger than the sum of its proper divisors (1).

64145189 is an equidigital number, since it uses as much as digits as its factorization.

64145189 is an evil number, because the sum of its binary digits is even.

The product of its digits is 34560, while the sum is 38.

The square root of 64145189 is about 8009.0691718826. The cubic root of 64145189 is about 400.3022486402.

The spelling of 64145189 in words is "sixty-four million, one hundred forty-five thousand, one hundred eighty-nine".