61717153 has 2 divisors, whose sum is σ = 61717154. Its totient is φ = 61717152.

The previous prime is 61717151. The next prime is 61717163. The reversal of 61717153 is 35171716.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 61277584 + 439569 = 7828^2 + 663^2 .

It is a cyclic number.

It is not a de Polignac number, because 61717153 - 2¹ = 61717151 is a prime.

Together with 61717151, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (61717151) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30858576 + 30858577.

It is an arithmetic number, because the mean of its divisors is an integer number (30858577).

Almost surely, 2^61717153 is an apocalyptic number.

It is an amenable number.

61717153 is a deficient number, since it is larger than the sum of its proper divisors (1).

61717153 is an equidigital number, since it uses as much as digits as its factorization.

61717153 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 4410, while the sum is 31.

The square root of 61717153 is about 7856.0265401792. The cubic root of 61717153 is about 395.1863736205.

Adding to 61717153 its reverse (35171716), we get a palindrome (96888869).

The spelling of 61717153 in words is "sixty-one million, seven hundred seventeen thousand, one hundred fifty-three".