61716449 has 2 divisors, whose sum is σ = 61716450. Its totient is φ = 61716448.

The previous prime is 61716377. The next prime is 61716451. The reversal of 61716449 is 94461716.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 51380224 + 10336225 = 7168^2 + 3215^2 .

It is a cyclic number.

It is not a de Polignac number, because 61716449 - 2²⁴ = 44939233 is a prime.

It is a Sophie Germain prime.

Together with 61716451, it forms a pair of twin primes.

It is a Chen prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (61716469) 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, 30858224 + 30858225.

It is an arithmetic number, because the mean of its divisors is an integer number (30858225).

Almost surely, 2^61716449 is an apocalyptic number.

It is an amenable number.

61716449 is a deficient number, since it is larger than the sum of its proper divisors (1).

61716449 is an equidigital number, since it uses as much as digits as its factorization.

61716449 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 36288, while the sum is 38.

The square root of 61716449 is about 7855.9817336855. The cubic root of 61716449 is about 395.1848710006.

The spelling of 61716449 in words is "sixty-one million, seven hundred sixteen thousand, four hundred forty-nine".