40330729 has 2 divisors, whose sum is σ = 40330730. Its totient is φ = 40330728.

The previous prime is 40330723. The next prime is 40330811. The reversal of 40330729 is 92703304.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 39087504 + 1243225 = 6252^2 + 1115^2 .

It is a cyclic number.

It is not a de Polignac number, because 40330729 - 2²¹ = 38233577 is a prime.

It is equal to p_2452609 and since 40330729 and 2452609 have the same sum of digits, it is a Honaker prime.

It is a junction number, because it is equal to n+sod(n) for n = 40330697 and 40330706.

It is not a weakly prime, because it can be changed into another prime (40330723) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20165364 + 20165365.

It is an arithmetic number, because the mean of its divisors is an integer number (20165365).

Almost surely, 2^40330729 is an apocalyptic number.

It is an amenable number.

40330729 is a deficient number, since it is larger than the sum of its proper divisors (1).

40330729 is an equidigital number, since it uses as much as digits as its factorization.

40330729 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4536, while the sum is 28.

The square root of 40330729 is about 6350.6479197008. The cubic root of 40330729 is about 342.9351678160.

The spelling of 40330729 in words is "forty million, three hundred thirty thousand, seven hundred twenty-nine".