40906321 has 2 divisors, whose sum is σ = 40906322. Its totient is φ = 40906320.

The previous prime is 40906291. The next prime is 40906331. The reversal of 40906321 is 12360904.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 39187600 + 1718721 = 6260^2 + 1311^2 .

It is a cyclic number.

It is not a de Polignac number, because 40906321 - 2⁵ = 40906289 is a prime.

It is not a weakly prime, because it can be changed into another prime (40906331) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20453160 + 20453161.

It is an arithmetic number, because the mean of its divisors is an integer number (20453161).

Almost surely, 2^40906321 is an apocalyptic number.

It is an amenable number.

40906321 is a deficient number, since it is larger than the sum of its proper divisors (1).

40906321 is an equidigital number, since it uses as much as digits as its factorization.

40906321 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1296, while the sum is 25.

The square root of 40906321 is about 6395.8049532487. The cubic root of 40906321 is about 344.5589013735.

The spelling of 40906321 in words is "forty million, nine hundred six thousand, three hundred twenty-one".