40079321 has 2 divisors, whose sum is σ = 40079322. Its totient is φ = 40079320.

The previous prime is 40079293. The next prime is 40079323. The reversal of 40079321 is 12397004.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 27040000 + 13039321 = 5200^2 + 3611^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-40079321 is a prime.

Together with 40079323, it forms a pair of twin primes.

It is a Chen prime.

It is equal to p_2438162 and since 40079321 and 2438162 have the same sum of digits, it is a Honaker prime.

It is not a weakly prime, because it can be changed into another prime (40079323) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20039660 + 20039661.

It is an arithmetic number, because the mean of its divisors is an integer number (20039661).

Almost surely, 2^40079321 is an apocalyptic number.

It is an amenable number.

40079321 is a deficient number, since it is larger than the sum of its proper divisors (1).

40079321 is an equidigital number, since it uses as much as digits as its factorization.

40079321 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1512, while the sum is 26.

The square root of 40079321 is about 6330.8230902466. The cubic root of 40079321 is about 342.2211017412.

The spelling of 40079321 in words is "forty million, seventy-nine thousand, three hundred twenty-one".