40226729 has 2 divisors, whose sum is σ = 40226730. Its totient is φ = 40226728.

The previous prime is 40226713. The next prime is 40226737. The reversal of 40226729 is 92762204.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 24010000 + 16216729 = 4900^2 + 4027^2 .

It is a cyclic number.

It is not a de Polignac number, because 40226729 - 2⁴ = 40226713 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 40226695 and 40226704.

It is not a weakly prime, because it can be changed into another prime (40226749) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20113364 + 20113365.

It is an arithmetic number, because the mean of its divisors is an integer number (20113365).

Almost surely, 2^40226729 is an apocalyptic number.

It is an amenable number.

40226729 is a deficient number, since it is larger than the sum of its proper divisors (1).

40226729 is an equidigital number, since it uses as much as digits as its factorization.

40226729 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 12096, while the sum is 32.

The square root of 40226729 is about 6342.4544933330. The cubic root of 40226729 is about 342.6401408499.

The spelling of 40226729 in words is "forty million, two hundred twenty-six thousand, seven hundred twenty-nine".