39947941 has 8 divisors (see below), whose sum is σ = 45474624. Its totient is φ = 34737120.

The previous prime is 39947939. The next prime is 39947953. The reversal of 39947941 is 14974993.

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

It is not a de Polignac number, because 39947941 - 2¹ = 39947939 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 39947891 and 39947900.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (39927941) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 78696 + ... + 79201.

It is an arithmetic number, because the mean of its divisors is an integer number (5684328).

Almost surely, 2^39947941 is an apocalyptic number.

It is an amenable number.

39947941 is a deficient number, since it is larger than the sum of its proper divisors (5526683).

39947941 is a wasteful number, since it uses less digits than its factorization.

39947941 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 157931.

The product of its digits is 244944, while the sum is 46.

The square root of 39947941 is about 6320.4383550510. The cubic root of 39947941 is about 341.8467588608.

It can be divided in two parts, 3994 and 7941, that added together give a triangular number (11935 = T₁₅₄).

The spelling of 39947941 in words is "thirty-nine million, nine hundred forty-seven thousand, nine hundred forty-one".