38849021929 has 4 divisors (see below), whose sum is σ = 39046225284. Its totient is φ = 38651818576.

The previous prime is 38849021923. The next prime is 38849021969. The reversal of 38849021929 is 92912094883.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 25099114329 + 13749907600 = 158427^2 + 117260^2 .

It is a cyclic number.

It is not a de Polignac number, because 38849021929 - 2⁷ = 38849021801 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 38849021929.

It is not an unprimeable number, because it can be changed into a prime (38849021923) 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 in 3 ways as a sum of consecutive naturals, for example, 98601382 + ... + 98601775.

It is an arithmetic number, because the mean of its divisors is an integer number (9761556321).

Almost surely, 2^38849021929 is an apocalyptic number.

It is an amenable number.

38849021929 is a deficient number, since it is larger than the sum of its proper divisors (197203355).

38849021929 is a wasteful number, since it uses less digits than its factorization.

38849021929 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 197203354.

The product of its (nonzero) digits is 2239488, while the sum is 55.

The spelling of 38849021929 in words is "thirty-eight billion, eight hundred forty-nine million, twenty-one thousand, nine hundred twenty-nine".