64738249 has 2 divisors, whose sum is σ = 64738250. Its totient is φ = 64738248.

The previous prime is 64738241. The next prime is 64738283. The reversal of 64738249 is 94283746.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 64689849 + 48400 = 8043^2 + 220^2 .

It is a cyclic number.

It is not a de Polignac number, because 64738249 - 2³ = 64738241 is a prime.

It is not a weakly prime, because it can be changed into another prime (64738241) 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, 32369124 + 32369125.

It is an arithmetic number, because the mean of its divisors is an integer number (32369125).

Almost surely, 2^64738249 is an apocalyptic number.

It is an amenable number.

64738249 is a deficient number, since it is larger than the sum of its proper divisors (1).

64738249 is an equidigital number, since it uses as much as digits as its factorization.

64738249 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 290304, while the sum is 43.

The square root of 64738249 is about 8046.0082649721. The cubic root of 64738249 is about 401.5321426046.

The spelling of 64738249 in words is "sixty-four million, seven hundred thirty-eight thousand, two hundred forty-nine".