61716013 has 2 divisors, whose sum is σ = 61716014. Its totient is φ = 61716012.

The previous prime is 61715989. The next prime is 61716041. The reversal of 61716013 is 31061716.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 57562569 + 4153444 = 7587^2 + 2038^2 .

It is a cyclic number.

It is not a de Polignac number, because 61716013 - 2²¹ = 59618861 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (61716073) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30858006 + 30858007.

It is an arithmetic number, because the mean of its divisors is an integer number (30858007).

Almost surely, 2^61716013 is an apocalyptic number.

It is an amenable number.

61716013 is a deficient number, since it is larger than the sum of its proper divisors (1).

61716013 is an equidigital number, since it uses as much as digits as its factorization.

61716013 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 756, while the sum is 25.

The square root of 61716013 is about 7855.9539840811. The cubic root of 61716013 is about 395.1839403950.

Adding to 61716013 its reverse (31061716), we get a palindrome (92777729).

The spelling of 61716013 in words is "sixty-one million, seven hundred sixteen thousand, thirteen".