39945143 has 12 divisors (see below), whose sum is σ = 47967552. Its totient is φ = 33132960.

The previous prime is 39945119. The next prime is 39945173. The reversal of 39945143 is 34154993.

39945143 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 39945143 - 2⁶ = 39945079 is a prime.

It is a super-2 number, since 2×39945143² = 3191228898580898, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 39945097 and 39945106.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (39945173) 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 11 ways as a sum of consecutive naturals, for example, 11630 + ... + 14667.

It is an arithmetic number, because the mean of its divisors is an integer number (3997296).

Almost surely, 2^39945143 is an apocalyptic number.

39945143 is a deficient number, since it is larger than the sum of its proper divisors (8022409).

39945143 is a wasteful number, since it uses less digits than its factorization.

39945143 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26342 (or 26335 counting only the distinct ones).

The product of its digits is 58320, while the sum is 38.

The square root of 39945143 is about 6320.2170057681. The cubic root of 39945143 is about 341.8387775603.

The spelling of 39945143 in words is "thirty-nine million, nine hundred forty-five thousand, one hundred forty-three".