39864846829 has 2 divisors, whose sum is σ = 39864846830. Its totient is φ = 39864846828.

The previous prime is 39864846821. The next prime is 39864846883. The reversal of 39864846829 is 92864846893.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 23324314729 + 16540532100 = 152723^2 + 128610^2 .

It is a cyclic number.

It is not a de Polignac number, because 39864846829 - 2³ = 39864846821 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (39864846821) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 19932423414 + 19932423415.

It is an arithmetic number, because the mean of its divisors is an integer number (19932423415).

Almost surely, 2^39864846829 is an apocalyptic number.

It is an amenable number.

39864846829 is a deficient number, since it is larger than the sum of its proper divisors (1).

39864846829 is an equidigital number, since it uses as much as digits as its factorization.

39864846829 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 143327232, while the sum is 67.

The spelling of 39864846829 in words is "thirty-nine billion, eight hundred sixty-four million, eight hundred forty-six thousand, eight hundred twenty-nine".