40373321 has 2 divisors, whose sum is σ = 40373322. Its totient is φ = 40373320.

The previous prime is 40373299. The next prime is 40373339. The reversal of 40373321 is 12337304.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 31753225 + 8620096 = 5635^2 + 2936^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-40373321 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (40373381) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20186660 + 20186661.

It is an arithmetic number, because the mean of its divisors is an integer number (20186661).

Almost surely, 2^40373321 is an apocalyptic number.

It is an amenable number.

40373321 is a deficient number, since it is larger than the sum of its proper divisors (1).

40373321 is an equidigital number, since it uses as much as digits as its factorization.

40373321 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 23.

The square root of 40373321 is about 6354.0003934529. Note that the first 3 decimals coincide. The cubic root of 40373321 is about 343.0558463185.

The spelling of 40373321 in words is "forty million, three hundred seventy-three thousand, three hundred twenty-one".