64999141 has 2 divisors, whose sum is σ = 64999142. Its totient is φ = 64999140.

The previous prime is 64999111. The next prime is 64999159. The reversal of 64999141 is 14199946.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 61308900 + 3690241 = 7830^2 + 1921^2 .

It is a cyclic number.

It is not a de Polignac number, because 64999141 - 2⁹ = 64998629 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (64999111) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32499570 + 32499571.

It is an arithmetic number, because the mean of its divisors is an integer number (32499571).

Almost surely, 2^64999141 is an apocalyptic number.

It is an amenable number.

64999141 is a deficient number, since it is larger than the sum of its proper divisors (1).

64999141 is an equidigital number, since it uses as much as digits as its factorization.

64999141 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 69984, while the sum is 43.

The square root of 64999141 is about 8062.2044752040. The cubic root of 64999141 is about 402.0708046699.

The spelling of 64999141 in words is "sixty-four million, nine hundred ninety-nine thousand, one hundred forty-one".