39948903121 has 4 divisors (see below), whose sum is σ = 40240501092. Its totient is φ = 39657305152.

The previous prime is 39948903119. The next prime is 39948903133. The reversal of 39948903121 is 12130984993.

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 11282688400 + 28666214721 = 106220^2 + 169311^2 .

It is a cyclic number.

It is not a de Polignac number, because 39948903121 - 2¹ = 39948903119 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (39948903821) 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, 145798780 + ... + 145799053.

It is an arithmetic number, because the mean of its divisors is an integer number (10060125273).

Almost surely, 2^39948903121 is an apocalyptic number.

It is an amenable number.

39948903121 is a deficient number, since it is larger than the sum of its proper divisors (291597971).

39948903121 is a wasteful number, since it uses less digits than its factorization.

39948903121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 291597970.

The product of its (nonzero) digits is 419904, while the sum is 49.

The spelling of 39948903121 in words is "thirty-nine billion, nine hundred forty-eight million, nine hundred three thousand, one hundred twenty-one".