65985929 has 2 divisors, whose sum is σ = 65985930. Its totient is φ = 65985928.

The previous prime is 65985893. The next prime is 65985947. The reversal of 65985929 is 92958956.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 65934400 + 51529 = 8120^2 + 227^2 .

It is a cyclic number.

It is not a de Polignac number, because 65985929 - 2²⁴ = 49208713 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (65985989) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32992964 + 32992965.

It is an arithmetic number, because the mean of its divisors is an integer number (32992965).

Almost surely, 2^65985929 is an apocalyptic number.

It is an amenable number.

65985929 is a deficient number, since it is larger than the sum of its proper divisors (1).

65985929 is an equidigital number, since it uses as much as digits as its factorization.

65985929 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1749600, while the sum is 53.

The square root of 65985929 is about 8123.1723482886. The cubic root of 65985929 is about 404.0952806835.

The spelling of 65985929 in words is "sixty-five million, nine hundred eighty-five thousand, nine hundred twenty-nine".