40992779 has 2 divisors, whose sum is σ = 40992780. Its totient is φ = 40992778.

The previous prime is 40992767. The next prime is 40992817. The reversal of 40992779 is 97729904.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-40992779 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (40992179) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20496389 + 20496390.

It is an arithmetic number, because the mean of its divisors is an integer number (20496390).

Almost surely, 2^40992779 is an apocalyptic number.

40992779 is a deficient number, since it is larger than the sum of its proper divisors (1).

40992779 is an equidigital number, since it uses as much as digits as its factorization.

40992779 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 285768, while the sum is 47.

The square root of 40992779 is about 6402.5603472361. The cubic root of 40992779 is about 344.8014792914.

The spelling of 40992779 in words is "forty million, nine hundred ninety-two thousand, seven hundred seventy-nine".