39121013 has 4 divisors (see below), whose sum is σ = 40030848. Its totient is φ = 38211180.

The previous prime is 39121007. The next prime is 39121021. The reversal of 39121013 is 31012193.

39121013 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 39121013 - 2⁴ = 39120997 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (39123013) 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 3 ways as a sum of consecutive naturals, for example, 454853 + ... + 454938.

It is an arithmetic number, because the mean of its divisors is an integer number (10007712).

Almost surely, 2^39121013 is an apocalyptic number.

It is an amenable number.

39121013 is a deficient number, since it is larger than the sum of its proper divisors (909835).

39121013 is an equidigital number, since it uses as much as digits as its factorization.

39121013 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 909834.

The product of its (nonzero) digits is 162, while the sum is 20.

The square root of 39121013 is about 6254.6792883408. The cubic root of 39121013 is about 339.4715348520.

The spelling of 39121013 in words is "thirty-nine million, one hundred twenty-one thousand, thirteen".