61640017 has 2 divisors, whose sum is σ = 61640018. Its totient is φ = 61640016.

The previous prime is 61640003. The next prime is 61640053. The reversal of 61640017 is 71004616.

It is a happy number.

61640017 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 61449921 + 190096 = 7839^2 + 436^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-61640017 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 61639973 and 61640000.

It is not a weakly prime, because it can be changed into another prime (61640057) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30820008 + 30820009.

It is an arithmetic number, because the mean of its divisors is an integer number (30820009).

Almost surely, 2^61640017 is an apocalyptic number.

It is an amenable number.

61640017 is a deficient number, since it is larger than the sum of its proper divisors (1).

61640017 is an equidigital number, since it uses as much as digits as its factorization.

61640017 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1008, while the sum is 25.

The square root of 61640017 is about 7851.1156532050. The cubic root of 61640017 is about 395.0216662794.

The spelling of 61640017 in words is "sixty-one million, six hundred forty thousand, seventeen".