42998869 has 2 divisors, whose sum is σ = 42998870. Its totient is φ = 42998868.

The previous prime is 42998863. The next prime is 42998887. The reversal of 42998869 is 96889924.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 37662769 + 5336100 = 6137^2 + 2310^2 .

It is a cyclic number.

It is not a de Polignac number, because 42998869 - 2³ = 42998861 is a prime.

It is a super-2 number, since 2×42998869² = 3697805470558322, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (42998861) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21499434 + 21499435.

It is an arithmetic number, because the mean of its divisors is an integer number (21499435).

Almost surely, 2^42998869 is an apocalyptic number.

It is an amenable number.

42998869 is a deficient number, since it is larger than the sum of its proper divisors (1).

42998869 is an equidigital number, since it uses as much as digits as its factorization.

42998869 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2239488, while the sum is 55.

The square root of 42998869 is about 6557.3522857934. The cubic root of 42998869 is about 350.3367344279.

The spelling of 42998869 in words is "forty-two million, nine hundred ninety-eight thousand, eight hundred sixty-nine".