39471986 has 4 divisors (see below), whose sum is σ = 59207982. Its totient is φ = 19735992.

The previous prime is 39471983. The next prime is 39471989. The reversal of 39471986 is 68917493.

39471986 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 68917493 = 1217 ⋅56629.

It is an interprime number because it is at equal distance from previous prime (39471983) and next prime (39471989).

It can be written as a sum of positive squares in only one way, i.e., 39450961 + 21025 = 6281^2 + 145^2 .

It is a super-3 number, since 3×39471986³ (a number of 24 digits) contains 333 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 39471986.

It is not an unprimeable number, because it can be changed into a prime (39471983) 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 as a sum of consecutive naturals, namely, 9867995 + ... + 9867998.

Almost surely, 2^39471986 is an apocalyptic number.

39471986 is a deficient number, since it is larger than the sum of its proper divisors (19735996).

39471986 is a wasteful number, since it uses less digits than its factorization.

39471986 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19735995.

The product of its digits is 326592, while the sum is 47.

The square root of 39471986 is about 6282.6734755198. The cubic root of 39471986 is about 340.4837002353.

The spelling of 39471986 in words is "thirty-nine million, four hundred seventy-one thousand, nine hundred eighty-six".