40105279 has 2 divisors, whose sum is σ = 40105280. Its totient is φ = 40105278.

The previous prime is 40105277. The next prime is 40105291. The reversal of 40105279 is 97250104.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 40105279 - 2¹ = 40105277 is a prime.

Together with 40105277, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (40105277) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20052639 + 20052640.

It is an arithmetic number, because the mean of its divisors is an integer number (20052640).

Almost surely, 2^40105279 is an apocalyptic number.

40105279 is a deficient number, since it is larger than the sum of its proper divisors (1).

40105279 is an equidigital number, since it uses as much as digits as its factorization.

40105279 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2520, while the sum is 28.

The square root of 40105279 is about 6332.8728867711. The cubic root of 40105279 is about 342.2949674156.

The spelling of 40105279 in words is "forty million, one hundred five thousand, two hundred seventy-nine".