61718273 has 2 divisors, whose sum is σ = 61718274. Its totient is φ = 61718272.

The previous prime is 61718263. The next prime is 61718297. The reversal of 61718273 is 37281716.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 60481729 + 1236544 = 7777^2 + 1112^2 .

It is a cyclic number.

It is not a de Polignac number, because 61718273 - 2¹⁶ = 61652737 is a prime.

It is not a weakly prime, because it can be changed into another prime (61718233) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30859136 + 30859137.

It is an arithmetic number, because the mean of its divisors is an integer number (30859137).

Almost surely, 2^61718273 is an apocalyptic number.

It is an amenable number.

61718273 is a deficient number, since it is larger than the sum of its proper divisors (1).

61718273 is an equidigital number, since it uses as much as digits as its factorization.

61718273 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 14112, while the sum is 35.

The square root of 61718273 is about 7856.0978227107. The cubic root of 61718273 is about 395.1887641286.

Adding to 61718273 its reverse (37281716), we get a palindrome (98999989).

The spelling of 61718273 in words is "sixty-one million, seven hundred eighteen thousand, two hundred seventy-three".