40955729 has 2 divisors, whose sum is σ = 40955730. Its totient is φ = 40955728.

The previous prime is 40955723. The next prime is 40955731. The reversal of 40955729 is 92755904.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 39037504 + 1918225 = 6248^2 + 1385^2 .

It is a cyclic number.

It is not a de Polignac number, because 40955729 - 2¹² = 40951633 is a prime.

Together with 40955731, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (40955723) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20477864 + 20477865.

It is an arithmetic number, because the mean of its divisors is an integer number (20477865).

Almost surely, 2^40955729 is an apocalyptic number.

It is an amenable number.

40955729 is a deficient number, since it is larger than the sum of its proper divisors (1).

40955729 is an equidigital number, since it uses as much as digits as its factorization.

40955729 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 113400, while the sum is 41.

The square root of 40955729 is about 6399.6663194263. Note that the first 3 decimals coincide. The cubic root of 40955729 is about 344.6975687509.

The spelling of 40955729 in words is "forty million, nine hundred fifty-five thousand, seven hundred twenty-nine".