61685329 has 2 divisors, whose sum is σ = 61685330. Its totient is φ = 61685328.

The previous prime is 61685321. The next prime is 61685363. The reversal of 61685329 is 92358616.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 41254929 + 20430400 = 6423^2 + 4520^2 .

It is a cyclic number.

It is not a de Polignac number, because 61685329 - 2³ = 61685321 is a prime.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 61685291 and 61685300.

It is not a weakly prime, because it can be changed into another prime (61685321) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30842664 + 30842665.

It is an arithmetic number, because the mean of its divisors is an integer number (30842665).

Almost surely, 2^61685329 is an apocalyptic number.

It is an amenable number.

61685329 is a deficient number, since it is larger than the sum of its proper divisors (1).

61685329 is an equidigital number, since it uses as much as digits as its factorization.

61685329 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 77760, while the sum is 40.

The square root of 61685329 is about 7854.0008276037. Note that the first 3 decimals coincide. The cubic root of 61685329 is about 395.1184369513.

The spelling of 61685329 in words is "sixty-one million, six hundred eighty-five thousand, three hundred twenty-nine".