39381971 has 8 divisors (see below), whose sum is σ = 40856400. Its totient is φ = 37915360.

The previous prime is 39381959. The next prime is 39381983. The reversal of 39381971 is 17918393.

It is an interprime number because it is at equal distance from previous prime (39381959) and next prime (39381983).

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-39381971 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (39381931) 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, 9536 + ... + 13026.

It is an arithmetic number, because the mean of its divisors is an integer number (5107050).

Almost surely, 2^39381971 is an apocalyptic number.

39381971 is a deficient number, since it is larger than the sum of its proper divisors (1474429).

39381971 is a wasteful number, since it uses less digits than its factorization.

39381971 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3909.

The product of its digits is 40824, while the sum is 41.

The square root of 39381971 is about 6275.5056369985. The cubic root of 39381971 is about 340.2246813648.

The spelling of 39381971 in words is "thirty-nine million, three hundred eighty-one thousand, nine hundred seventy-one".