42998889929 has 2 divisors, whose sum is σ = 42998889930. Its totient is φ = 42998889928.

The previous prime is 42998889863. The next prime is 42998889937. The reversal of 42998889929 is 92998889924.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 28080710329 + 14918179600 = 167573^2 + 122140^2 .

It is a cyclic number.

It is not a de Polignac number, because 42998889929 - 2⁸ = 42998889673 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 42998889929.

It is not a weakly prime, because it can be changed into another prime (42998889979) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21499444964 + 21499444965.

It is an arithmetic number, because the mean of its divisors is an integer number (21499444965).

Almost surely, 2^42998889929 is an apocalyptic number.

It is an amenable number.

42998889929 is a deficient number, since it is larger than the sum of its proper divisors (1).

42998889929 is an equidigital number, since it uses as much as digits as its factorization.

42998889929 is an evil number, because the sum of its binary digits is even.

The product of its digits is 483729408, while the sum is 77.

The spelling of 42998889929 in words is "forty-two billion, nine hundred ninety-eight million, eight hundred eighty-nine thousand, nine hundred twenty-nine".