39829971 has 4 divisors (see below), whose sum is σ = 53106632. Its totient is φ = 26553312.

The previous prime is 39829969. The next prime is 39829981. The reversal of 39829971 is 17992893.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 17992893 = 3 ⋅5997631.

It is not a de Polignac number, because 39829971 - 2¹ = 39829969 is a prime.

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 39829971.

It is not an unprimeable number, because it can be changed into a prime (39829921) 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, 6638326 + ... + 6638331.

It is an arithmetic number, because the mean of its divisors is an integer number (13276658).

Almost surely, 2^39829971 is an apocalyptic number.

39829971 is a deficient number, since it is larger than the sum of its proper divisors (13276661).

39829971 is a wasteful number, since it uses less digits than its factorization.

39829971 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13276660.

The product of its digits is 244944, while the sum is 48.

The square root of 39829971 is about 6311.0990326567. The cubic root of 39829971 is about 341.5099252760.

The spelling of 39829971 in words is "thirty-nine million, eight hundred twenty-nine thousand, nine hundred seventy-one".