41979821 has 8 divisors (see below), whose sum is σ = 45259704. Its totient is φ = 38707200.

The previous prime is 41979811. The next prime is 41979827. The reversal of 41979821 is 12897914.

It can be written as a sum of positive squares in 4 ways, for example, as 19758025 + 22221796 = 4445^2 + 4714^2 .

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 41979821 - 2¹⁴ = 41963437 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (41979827) 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, 19805 + ... + 21821.

It is an arithmetic number, because the mean of its divisors is an integer number (5657463).

Almost surely, 2^41979821 is an apocalyptic number.

It is an amenable number.

41979821 is a deficient number, since it is larger than the sum of its proper divisors (3279883).

41979821 is a wasteful number, since it uses less digits than its factorization.

41979821 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3631.

The product of its digits is 36288, while the sum is 41.

The square root of 41979821 is about 6479.1836677162. The cubic root of 41979821 is about 347.5469867283.

The spelling of 41979821 in words is "forty-one million, nine hundred seventy-nine thousand, eight hundred twenty-one".