61716287 has 2 divisors, whose sum is σ = 61716288. Its totient is φ = 61716286.

The previous prime is 61716271. The next prime is 61716293. The reversal of 61716287 is 78261716.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 61716287 - 2⁴ = 61716271 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 61716287.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (61716587) 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, 30858143 + 30858144.

It is an arithmetic number, because the mean of its divisors is an integer number (30858144).

Almost surely, 2^61716287 is an apocalyptic number.

61716287 is a deficient number, since it is larger than the sum of its proper divisors (1).

61716287 is an equidigital number, since it uses as much as digits as its factorization.

61716287 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 28224, while the sum is 38.

The square root of 61716287 is about 7855.9714230641. The cubic root of 61716287 is about 395.1845252256.

The spelling of 61716287 in words is "sixty-one million, seven hundred sixteen thousand, two hundred eighty-seven".