42998887 has 2 divisors, whose sum is σ = 42998888. Its totient is φ = 42998886.

The previous prime is 42998869. The next prime is 42998939. The reversal of 42998887 is 78889924.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 42998887 - 2¹⁹ = 42474599 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (42998827) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21499443 + 21499444.

It is an arithmetic number, because the mean of its divisors is an integer number (21499444).

Almost surely, 2^42998887 is an apocalyptic number.

42998887 is a deficient number, since it is larger than the sum of its proper divisors (1).

42998887 is an equidigital number, since it uses as much as digits as its factorization.

42998887 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2322432, while the sum is 55.

The square root of 42998887 is about 6557.3536582984. The cubic root of 42998887 is about 350.3367833133.

The spelling of 42998887 in words is "forty-two million, nine hundred ninety-eight thousand, eight hundred eighty-seven".