39006861 has 4 divisors (see below), whose sum is σ = 52009152. Its totient is φ = 26004572.

The previous prime is 39006841. The next prime is 39006871. The reversal of 39006861 is 16860093.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 39006861 - 2⁷ = 39006733 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (39006811) 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, 6501141 + ... + 6501146.

It is an arithmetic number, because the mean of its divisors is an integer number (13002288).

Almost surely, 2^39006861 is an apocalyptic number.

It is an amenable number.

39006861 is a deficient number, since it is larger than the sum of its proper divisors (13002291).

39006861 is a wasteful number, since it uses less digits than its factorization.

39006861 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13002290.

The product of its (nonzero) digits is 7776, while the sum is 33.

The square root of 39006861 is about 6245.5472938727. The cubic root of 39006861 is about 339.1410295471.

The spelling of 39006861 in words is "thirty-nine million, six thousand, eight hundred sixty-one".