40832821 has 2 divisors, whose sum is σ = 40832822. Its totient is φ = 40832820.

The previous prime is 40832791. The next prime is 40832833. The reversal of 40832821 is 12823804.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 32364721 + 8468100 = 5689^2 + 2910^2 .

It is a cyclic number.

It is not a de Polignac number, because 40832821 - 2²³ = 32444213 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 40832821.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (40832021) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20416410 + 20416411.

It is an arithmetic number, because the mean of its divisors is an integer number (20416411).

Almost surely, 2^40832821 is an apocalyptic number.

It is an amenable number.

40832821 is a deficient number, since it is larger than the sum of its proper divisors (1).

40832821 is an equidigital number, since it uses as much as digits as its factorization.

40832821 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3072, while the sum is 28.

The square root of 40832821 is about 6390.0564160264. The cubic root of 40832821 is about 344.3524111806.

The spelling of 40832821 in words is "forty million, eight hundred thirty-two thousand, eight hundred twenty-one".