65447617 has 2 divisors, whose sum is σ = 65447618. Its totient is φ = 65447616.

The previous prime is 65447573. The next prime is 65447623. The reversal of 65447617 is 71674456.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 51279921 + 14167696 = 7161^2 + 3764^2 .

It is a cyclic number.

It is not a de Polignac number, because 65447617 - 2¹⁵ = 65414849 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 65447617.

It is not a weakly prime, because it can be changed into another prime (65445617) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32723808 + 32723809.

It is an arithmetic number, because the mean of its divisors is an integer number (32723809).

Almost surely, 2^65447617 is an apocalyptic number.

It is an amenable number.

65447617 is a deficient number, since it is larger than the sum of its proper divisors (1).

65447617 is an equidigital number, since it uses as much as digits as its factorization.

65447617 is an evil number, because the sum of its binary digits is even.

The product of its digits is 141120, while the sum is 40.

The square root of 65447617 is about 8089.9701482762. The cubic root of 65447617 is about 402.9934115875.

It can be divided in two parts, 6544 and 7617, that added together give a square (14161 = 119²).

The spelling of 65447617 in words is "sixty-five million, four hundred forty-seven thousand, six hundred seventeen".