40667399 has 2 divisors, whose sum is σ = 40667400. Its totient is φ = 40667398.

The previous prime is 40667357. The next prime is 40667437. The reversal of 40667399 is 99376604.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 40667399 - 2¹⁶ = 40601863 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (40667299) 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, 20333699 + 20333700.

It is an arithmetic number, because the mean of its divisors is an integer number (20333700).

Almost surely, 2^40667399 is an apocalyptic number.

40667399 is a deficient number, since it is larger than the sum of its proper divisors (1).

40667399 is an equidigital number, since it uses as much as digits as its factorization.

40667399 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 244944, while the sum is 44.

The square root of 40667399 is about 6377.0995758260. The cubic root of 40667399 is about 343.8867681002.

The spelling of 40667399 in words is "forty million, six hundred sixty-seven thousand, three hundred ninety-nine".