64430549 has 2 divisors, whose sum is σ = 64430550. Its totient is φ = 64430548.

The previous prime is 64430533. The next prime is 64430573. The reversal of 64430549 is 94503446.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 39250225 + 25180324 = 6265^2 + 5018^2 .

It is a cyclic number.

It is not a de Polignac number, because 64430549 - 2⁴ = 64430533 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (64430599) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32215274 + 32215275.

It is an arithmetic number, because the mean of its divisors is an integer number (32215275).

Almost surely, 2^64430549 is an apocalyptic number.

It is an amenable number.

64430549 is a deficient number, since it is larger than the sum of its proper divisors (1).

64430549 is an equidigital number, since it uses as much as digits as its factorization.

64430549 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 51840, while the sum is 35.

The square root of 64430549 is about 8026.8642071484. The cubic root of 64430549 is about 400.8949731476.

The spelling of 64430549 in words is "sixty-four million, four hundred thirty thousand, five hundred forty-nine".