40024129997 has 2 divisors, whose sum is σ = 40024129998. Its totient is φ = 40024129996.

The previous prime is 40024129993. The next prime is 40024130023. The reversal of 40024129997 is 79992142004.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 39531778276 + 492351721 = 198826^2 + 22189^2 .

It is a cyclic number.

It is not a de Polignac number, because 40024129997 - 2² = 40024129993 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (40024129993) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20012064998 + 20012064999.

It is an arithmetic number, because the mean of its divisors is an integer number (20012064999).

Almost surely, 2^40024129997 is an apocalyptic number.

It is an amenable number.

40024129997 is a deficient number, since it is larger than the sum of its proper divisors (1).

40024129997 is an equidigital number, since it uses as much as digits as its factorization.

40024129997 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 326592, while the sum is 47.

The spelling of 40024129997 in words is "forty billion, twenty-four million, one hundred twenty-nine thousand, nine hundred ninety-seven".