61683929 has 2 divisors, whose sum is σ = 61683930. Its totient is φ = 61683928.

The previous prime is 61683917. The next prime is 61683943. The reversal of 61683929 is 92938616.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 48163600 + 13520329 = 6940^2 + 3677^2 .

It is a cyclic number.

It is not a de Polignac number, because 61683929 - 2⁸ = 61683673 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 61683929.

It is not a weakly prime, because it can be changed into another prime (61683829) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30841964 + 30841965.

It is an arithmetic number, because the mean of its divisors is an integer number (30841965).

Almost surely, 2^61683929 is an apocalyptic number.

It is an amenable number.

61683929 is a deficient number, since it is larger than the sum of its proper divisors (1).

61683929 is an equidigital number, since it uses as much as digits as its factorization.

61683929 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 139968, while the sum is 44.

The square root of 61683929 is about 7853.9117005477. The cubic root of 61683929 is about 395.1154477478.

The spelling of 61683929 in words is "sixty-one million, six hundred eighty-three thousand, nine hundred twenty-nine".