40334821 has 2 divisors, whose sum is σ = 40334822. Its totient is φ = 40334820.

The previous prime is 40334809. The next prime is 40334837. The reversal of 40334821 is 12843304.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 40322500 + 12321 = 6350^2 + 111^2 .

It is a cyclic number.

It is not a de Polignac number, because 40334821 - 2⁹ = 40334309 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (40334851) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20167410 + 20167411.

It is an arithmetic number, because the mean of its divisors is an integer number (20167411).

Almost surely, 2^40334821 is an apocalyptic number.

It is an amenable number.

40334821 is a deficient number, since it is larger than the sum of its proper divisors (1).

40334821 is an equidigital number, since it uses as much as digits as its factorization.

40334821 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2304, while the sum is 25.

The square root of 40334821 is about 6350.9700833810. The cubic root of 40334821 is about 342.9467656166.

The spelling of 40334821 in words is "forty million, three hundred thirty-four thousand, eight hundred twenty-one".