39900121 has 8 divisors (see below), whose sum is σ = 40557920. Its totient is φ = 39245472.

The previous prime is 39900103. The next prime is 39900163. The reversal of 39900121 is 12100993.

39900121 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 39900121 - 2¹¹ = 39898073 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (39900181) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 44746 + ... + 45628.

It is an arithmetic number, because the mean of its divisors is an integer number (5069740).

Almost surely, 2^39900121 is an apocalyptic number.

It is an amenable number.

39900121 is a deficient number, since it is larger than the sum of its proper divisors (657799).

39900121 is an equidigital number, since it uses as much as digits as its factorization.

39900121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1575.

The product of its (nonzero) digits is 486, while the sum is 25.

The square root of 39900121 is about 6316.6542568040. The cubic root of 39900121 is about 341.7103009379.

The spelling of 39900121 in words is "thirty-nine million, nine hundred thousand, one hundred twenty-one".