39987106 has 4 divisors (see below), whose sum is σ = 59980662. Its totient is φ = 19993552.

The previous prime is 39987097. The next prime is 39987107. The reversal of 39987106 is 60178993.

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

It can be written as a sum of positive squares in only one way, i.e., 24059025 + 15928081 = 4905^2 + 3991^2 .

It is not an unprimeable number, because it can be changed into a prime (39987107) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9996775 + ... + 9996778.

Almost surely, 2^39987106 is an apocalyptic number.

39987106 is a deficient number, since it is larger than the sum of its proper divisors (19993556).

39987106 is a wasteful number, since it uses less digits than its factorization.

39987106 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19993555.

The product of its (nonzero) digits is 81648, while the sum is 43.

The square root of 39987106 is about 6323.5358779721. The cubic root of 39987106 is about 341.9584380030.

The spelling of 39987106 in words is "thirty-nine million, nine hundred eighty-seven thousand, one hundred six".