40729999 has 2 divisors, whose sum is σ = 40730000. Its totient is φ = 40729998.

The previous prime is 40729991. The next prime is 40730003. The reversal of 40729999 is 99992704.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 40729999 - 2³ = 40729991 is a prime.

40729999 is a modest number, since divided by 9999 gives 4072 as remainder.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (40729991) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20364999 + 20365000.

It is an arithmetic number, because the mean of its divisors is an integer number (20365000).

Almost surely, 2^40729999 is an apocalyptic number.

40729999 is a deficient number, since it is larger than the sum of its proper divisors (1).

40729999 is an equidigital number, since it uses as much as digits as its factorization.

40729999 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 367416, while the sum is 49.

The square root of 40729999 is about 6382.0058758983. The cubic root of 40729999 is about 344.0631278368.

The spelling of 40729999 in words is "forty million, seven hundred twenty-nine thousand, nine hundred ninety-nine".