64591229 has 2 divisors, whose sum is σ = 64591230. Its totient is φ = 64591228.

The previous prime is 64591223. The next prime is 64591231. The reversal of 64591229 is 92219546.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 61622500 + 2968729 = 7850^2 + 1723^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-64591229 is a prime.

Together with 64591231, it forms a pair of twin primes.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 64591192 and 64591201.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (64591223) 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, 32295614 + 32295615.

It is an arithmetic number, because the mean of its divisors is an integer number (32295615).

Almost surely, 2^64591229 is an apocalyptic number.

It is an amenable number.

64591229 is a deficient number, since it is larger than the sum of its proper divisors (1).

64591229 is an equidigital number, since it uses as much as digits as its factorization.

64591229 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 38880, while the sum is 38.

The square root of 64591229 is about 8036.8668646432. The cubic root of 64591229 is about 401.2279535510.

The spelling of 64591229 in words is "sixty-four million, five hundred ninety-one thousand, two hundred twenty-nine".