64432861 has 2 divisors, whose sum is σ = 64432862. Its totient is φ = 64432860.

The previous prime is 64432829. The next prime is 64432871. The reversal of 64432861 is 16823446.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 64080025 + 352836 = 8005^2 + 594^2 .

It is a cyclic number.

It is not a de Polignac number, because 64432861 - 2⁵ = 64432829 is a prime.

It is equal to p_3809185 and since 64432861 and 3809185 have the same sum of digits, it is a Honaker prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (64432801) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32216430 + 32216431.

It is an arithmetic number, because the mean of its divisors is an integer number (32216431).

Almost surely, 2^64432861 is an apocalyptic number.

It is an amenable number.

64432861 is a deficient number, since it is larger than the sum of its proper divisors (1).

64432861 is an equidigital number, since it uses as much as digits as its factorization.

64432861 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 27648, while the sum is 34.

The square root of 64432861 is about 8027.0082222457. The cubic root of 64432861 is about 400.8997682751.

The spelling of 64432861 in words is "sixty-four million, four hundred thirty-two thousand, eight hundred sixty-one".