239997942829 has 2 divisors, whose sum is σ = 239997942830. Its totient is φ = 239997942828.

The previous prime is 239997942803. The next prime is 239997942839. The reversal of 239997942829 is 928249799932.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 138233752804 + 101764190025 = 371798^2 + 319005^2 .

It is a cyclic number.

It is not a de Polignac number, because 239997942829 - 2²⁵ = 239964388397 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (239997942839) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 119998971414 + 119998971415.

It is an arithmetic number, because the mean of its divisors is an integer number (119998971415).

Almost surely, 2^239997942829 is an apocalyptic number.

It is an amenable number.

239997942829 is a deficient number, since it is larger than the sum of its proper divisors (1).

239997942829 is an equidigital number, since it uses as much as digits as its factorization.

239997942829 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 317447424, while the sum is 73.

The spelling of 239997942829 in words is "two hundred thirty-nine billion, nine hundred ninety-seven million, nine hundred forty-two thousand, eight hundred twenty-nine".