39945161 has 8 divisors (see below), whose sum is σ = 40793760. Its totient is φ = 39105472.

The previous prime is 39945119. The next prime is 39945173. The reversal of 39945161 is 16154993.

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 39945161 - 2²² = 35750857 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (39944161) 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 7 ways as a sum of consecutive naturals, for example, 7250 + ... + 11508.

It is an arithmetic number, because the mean of its divisors is an integer number (5099220).

Almost surely, 2^39945161 is an apocalyptic number.

It is an amenable number.

39945161 is a deficient number, since it is larger than the sum of its proper divisors (848599).

39945161 is a wasteful number, since it uses less digits than its factorization.

39945161 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4455.

The product of its digits is 29160, while the sum is 38.

The square root of 39945161 is about 6320.2184297697. The cubic root of 39945161 is about 341.8388289066.

The spelling of 39945161 in words is "thirty-nine million, nine hundred forty-five thousand, one hundred sixty-one".