39138629 has 2 divisors, whose sum is σ = 39138630. Its totient is φ = 39138628.

The previous prime is 39138623. The next prime is 39138667. The reversal of 39138629 is 92683193.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 31382404 + 7756225 = 5602^2 + 2785^2 .

It is a cyclic number.

It is not a de Polignac number, because 39138629 - 2¹⁶ = 39073093 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (39138623) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 19569314 + 19569315.

It is an arithmetic number, because the mean of its divisors is an integer number (19569315).

Almost surely, 2^39138629 is an apocalyptic number.

It is an amenable number.

39138629 is a deficient number, since it is larger than the sum of its proper divisors (1).

39138629 is an equidigital number, since it uses as much as digits as its factorization.

39138629 is an evil number, because the sum of its binary digits is even.

The product of its digits is 69984, while the sum is 41.

The square root of 39138629 is about 6256.0873555282. The cubic root of 39138629 is about 339.5224813273.

The spelling of 39138629 in words is "thirty-nine million, one hundred thirty-eight thousand, six hundred twenty-nine".