64748249 has 2 divisors, whose sum is σ = 64748250. Its totient is φ = 64748248.

The previous prime is 64748141. The next prime is 64748251. The reversal of 64748249 is 94284746.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 64513024 + 235225 = 8032^2 + 485^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-64748249 is a prime.

Together with 64748251, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (64748269) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32374124 + 32374125.

It is an arithmetic number, because the mean of its divisors is an integer number (32374125).

Almost surely, 2^64748249 is an apocalyptic number.

It is an amenable number.

64748249 is a deficient number, since it is larger than the sum of its proper divisors (1).

64748249 is an equidigital number, since it uses as much as digits as its factorization.

64748249 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 387072, while the sum is 44.

The square root of 64748249 is about 8046.6296671339. The cubic root of 64748249 is about 401.5528161876.

The spelling of 64748249 in words is "sixty-four million, seven hundred forty-eight thousand, two hundred forty-nine".