39747961 has 8 divisors (see below), whose sum is σ = 43614144. Its totient is φ = 35923920.

The previous prime is 39747949. The next prime is 39747971. The reversal of 39747961 is 16974793.

39747961 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is a cyclic number.

It is not a de Polignac number, because 39747961 - 2¹¹ = 39745913 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (39747931) 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 in 7 ways as a sum of consecutive naturals, for example, 8541 + ... + 12346.

It is an arithmetic number, because the mean of its divisors is an integer number (5451768).

Almost surely, 2^39747961 is an apocalyptic number.

It is an amenable number.

39747961 is a deficient number, since it is larger than the sum of its proper divisors (3866183).

39747961 is a wasteful number, since it uses less digits than its factorization.

39747961 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21071.

The product of its digits is 285768, while the sum is 46.

The square root of 39747961 is about 6304.5984011672. The cubic root of 39747961 is about 341.2753743202.

It can be divided in two parts, 3974 and 7961, that added together give a triangular number (11935 = T₁₅₄).

The spelling of 39747961 in words is "thirty-nine million, seven hundred forty-seven thousand, nine hundred sixty-one".