75663449 has 2 divisors, whose sum is σ = 75663450. Its totient is φ = 75663448.

The previous prime is 75663433. The next prime is 75663457. The reversal of 75663449 is 94436657.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 64561225 + 11102224 = 8035^2 + 3332^2 .

It is a cyclic number.

It is not a de Polignac number, because 75663449 - 2⁴ = 75663433 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (75663499) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 37831724 + 37831725.

It is an arithmetic number, because the mean of its divisors is an integer number (37831725).

Almost surely, 2^75663449 is an apocalyptic number.

It is an amenable number.

75663449 is a deficient number, since it is larger than the sum of its proper divisors (1).

75663449 is an equidigital number, since it uses as much as digits as its factorization.

75663449 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 544320, while the sum is 44.

The square root of 75663449 is about 8698.4739466185. The cubic root of 75663449 is about 422.9561829249.

The spelling of 75663449 in words is "seventy-five million, six hundred sixty-three thousand, four hundred forty-nine".