64634249 has 2 divisors, whose sum is σ = 64634250. Its totient is φ = 64634248.

The previous prime is 64634239. The next prime is 64634291. The reversal of 64634249 is 94243646.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 36385024 + 28249225 = 6032^2 + 5315^2 .

It is a cyclic number.

It is not a de Polignac number, because 64634249 - 2⁴ = 64634233 is a prime.

It is a super-2 number, since 2×64634249² = 8355172287588002, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (64634239) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32317124 + 32317125.

It is an arithmetic number, because the mean of its divisors is an integer number (32317125).

Almost surely, 2^64634249 is an apocalyptic number.

It is an amenable number.

64634249 is a deficient number, since it is larger than the sum of its proper divisors (1).

64634249 is an equidigital number, since it uses as much as digits as its factorization.

64634249 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 124416, while the sum is 38.

The square root of 64634249 is about 8039.5428352612. The cubic root of 64634249 is about 401.3170110291.

The spelling of 64634249 in words is "sixty-four million, six hundred thirty-four thousand, two hundred forty-nine".