39173121 has 24 divisors (see below), whose sum is σ = 62589800. Its totient is φ = 23452416.

The previous prime is 39173093. The next prime is 39173131. The reversal of 39173121 is 12137193.

It can be written as a sum of positive squares in 4 ways, for example, as 12702096 + 26471025 = 3564^2 + 5145^2 .

It is not a de Polignac number, because 39173121 - 2⁵ = 39173089 is a prime.

It is not an unprimeable number, because it can be changed into a prime (39173131) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 196 + ... + 8853.

Almost surely, 2^39173121 is an apocalyptic number.

It is an amenable number.

39173121 is a deficient number, since it is larger than the sum of its proper divisors (23416679).

39173121 is a wasteful number, since it uses less digits than its factorization.

39173121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9105 (or 9102 counting only the distinct ones).

The product of its digits is 1134, while the sum is 27.

The square root of 39173121 is about 6258.8434235089. The cubic root of 39173121 is about 339.6221899038.

The spelling of 39173121 in words is "thirty-nine million, one hundred seventy-three thousand, one hundred twenty-one".