61718471 has 2 divisors, whose sum is σ = 61718472. Its totient is φ = 61718470.

The previous prime is 61718417. The next prime is 61718497. The reversal of 61718471 is 17481716.

Together with previous prime (61718417) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 61718471 - 2¹⁴ = 61702087 is a prime.

It is a super-3 number, since 3×61718471³ (a number of 24 digits) contains 333 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (61718401) 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, 30859235 + 30859236.

It is an arithmetic number, because the mean of its divisors is an integer number (30859236).

Almost surely, 2^61718471 is an apocalyptic number.

61718471 is a deficient number, since it is larger than the sum of its proper divisors (1).

61718471 is an equidigital number, since it uses as much as digits as its factorization.

61718471 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 9408, while the sum is 35.

The square root of 61718471 is about 7856.1104243767. The cubic root of 61718471 is about 395.1891867332.

The spelling of 61718471 in words is "sixty-one million, seven hundred eighteen thousand, four hundred seventy-one".