64874149 has 2 divisors, whose sum is σ = 64874150. Its totient is φ = 64874148.

The previous prime is 64874141. The next prime is 64874203. The reversal of 64874149 is 94147846.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 62964225 + 1909924 = 7935^2 + 1382^2 .

It is a cyclic number.

It is not a de Polignac number, because 64874149 - 2³ = 64874141 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (64874141) 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, 32437074 + 32437075.

It is an arithmetic number, because the mean of its divisors is an integer number (32437075).

Almost surely, 2^64874149 is an apocalyptic number.

It is an amenable number.

64874149 is a deficient number, since it is larger than the sum of its proper divisors (1).

64874149 is an equidigital number, since it uses as much as digits as its factorization.

64874149 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 193536, while the sum is 43.

The square root of 64874149 is about 8054.4490190205. The cubic root of 64874149 is about 401.8129146874.

The spelling of 64874149 in words is "sixty-four million, eight hundred seventy-four thousand, one hundred forty-nine".