39919938029 has 2 divisors, whose sum is σ = 39919938030. Its totient is φ = 39919938028.

The previous prime is 39919937989. The next prime is 39919938043. The reversal of 39919938029 is 92083991993.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 39919240804 + 697225 = 199798^2 + 835^2 .

It is a cyclic number.

It is not a de Polignac number, because 39919938029 - 2¹⁶ = 39919872493 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (39919938629) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 19959969014 + 19959969015.

It is an arithmetic number, because the mean of its divisors is an integer number (19959969015).

Almost surely, 2^39919938029 is an apocalyptic number.

It is an amenable number.

39919938029 is a deficient number, since it is larger than the sum of its proper divisors (1).

39919938029 is an equidigital number, since it uses as much as digits as its factorization.

39919938029 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 8503056, while the sum is 62.

The spelling of 39919938029 in words is "thirty-nine billion, nine hundred nineteen million, nine hundred thirty-eight thousand, twenty-nine".