39172143 has 8 divisors (see below), whose sum is σ = 52747056. Its totient is φ = 25856000.

The previous prime is 39172123. The next prime is 39172163. The reversal of 39172143 is 34127193.

39172143 is nontrivially palindromic in base 15.

It is an interprime number because it is at equal distance from previous prime (39172123) and next prime (39172163).

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 39172143 - 2⁸ = 39171887 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 39172143.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (39172123) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 64338 + ... + 64943.

It is an arithmetic number, because the mean of its divisors is an integer number (6593382).

Almost surely, 2^39172143 is an apocalyptic number.

39172143 is a deficient number, since it is larger than the sum of its proper divisors (13574913).

39172143 is a wasteful number, since it uses less digits than its factorization.

39172143 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 129385.

The product of its digits is 4536, while the sum is 30.

The square root of 39172143 is about 6258.7652935703. The cubic root of 39172143 is about 339.6193635333.

The spelling of 39172143 in words is "thirty-nine million, one hundred seventy-two thousand, one hundred forty-three".