39493171 has 4 divisors (see below), whose sum is σ = 40560592. Its totient is φ = 38425752.

The previous prime is 39493133. The next prime is 39493183. The reversal of 39493171 is 17139493.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 39493171 - 2¹⁵ = 39460403 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (37), and also a Moran number because the ratio is a prime number: 1067383 = 39493171 / (3 + 9 + 4 + 9 + 3 + 1 + 7 + 1).

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 39493171.

It is not an unprimeable number, because it can be changed into a prime (39491171) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 533655 + ... + 533728.

It is an arithmetic number, because the mean of its divisors is an integer number (10140148).

Almost surely, 2^39493171 is an apocalyptic number.

39493171 is a deficient number, since it is larger than the sum of its proper divisors (1067421).

39493171 is a wasteful number, since it uses less digits than its factorization.

39493171 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1067420.

The product of its digits is 20412, while the sum is 37.

The square root of 39493171 is about 6284.3592354352. The cubic root of 39493171 is about 340.5446029822.

The spelling of 39493171 in words is "thirty-nine million, four hundred ninety-three thousand, one hundred seventy-one".