65439929 has 2 divisors, whose sum is σ = 65439930. Its totient is φ = 65439928.

The previous prime is 65439911. The next prime is 65439961. The reversal of 65439929 is 92993456.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 41576704 + 23863225 = 6448^2 + 4885^2 .

It is a cyclic number.

It is not a de Polignac number, because 65439929 - 2¹² = 65435833 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (65439029) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32719964 + 32719965.

It is an arithmetic number, because the mean of its divisors is an integer number (32719965).

Almost surely, 2^65439929 is an apocalyptic number.

It is an amenable number.

65439929 is a deficient number, since it is larger than the sum of its proper divisors (1).

65439929 is an equidigital number, since it uses as much as digits as its factorization.

65439929 is an evil number, because the sum of its binary digits is even.

The product of its digits is 524880, while the sum is 47.

The square root of 65439929 is about 8089.4949780564. The cubic root of 65439929 is about 402.9776313609.

The spelling of 65439929 in words is "sixty-five million, four hundred thirty-nine thousand, nine hundred twenty-nine".