40422779 has 2 divisors, whose sum is σ = 40422780. Its totient is φ = 40422778.

The previous prime is 40422763. The next prime is 40422793. The reversal of 40422779 is 97722404.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 40422779 - 2⁴ = 40422763 is a prime.

It is a Sophie Germain prime.

It is not a weakly prime, because it can be changed into another prime (40422749) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20211389 + 20211390.

It is an arithmetic number, because the mean of its divisors is an integer number (20211390).

Almost surely, 2^40422779 is an apocalyptic number.

40422779 is a deficient number, since it is larger than the sum of its proper divisors (1).

40422779 is an equidigital number, since it uses as much as digits as its factorization.

40422779 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 28224, while the sum is 35.

The square root of 40422779 is about 6357.8910811683. The cubic root of 40422779 is about 343.1958722243.

The spelling of 40422779 in words is "forty million, four hundred twenty-two thousand, seven hundred seventy-nine".