64509229 has 2 divisors, whose sum is σ = 64509230. Its totient is φ = 64509228.

The previous prime is 64509191. The next prime is 64509257. The reversal of 64509229 is 92290546.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 57608100 + 6901129 = 7590^2 + 2627^2 .

It is a cyclic number.

It is not a de Polignac number, because 64509229 - 2¹³ = 64501037 is a prime.

It is a super-2 number, since 2×64509229² = 8322881252348882, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (64509629) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32254614 + 32254615.

It is an arithmetic number, because the mean of its divisors is an integer number (32254615).

Almost surely, 2^64509229 is an apocalyptic number.

It is an amenable number.

64509229 is a deficient number, since it is larger than the sum of its proper divisors (1).

64509229 is an equidigital number, since it uses as much as digits as its factorization.

64509229 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 38880, while the sum is 37.

The square root of 64509229 is about 8031.7637539958. The cubic root of 64509229 is about 401.0580923834.

The spelling of 64509229 in words is "sixty-four million, five hundred nine thousand, two hundred twenty-nine".