42830989 has 2 divisors, whose sum is σ = 42830990. Its totient is φ = 42830988.

The previous prime is 42830981. The next prime is 42831001. The reversal of 42830989 is 98903824.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 36505764 + 6325225 = 6042^2 + 2515^2 .

It is a cyclic number.

It is not a de Polignac number, because 42830989 - 2³ = 42830981 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (42830981) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21415494 + 21415495.

It is an arithmetic number, because the mean of its divisors is an integer number (21415495).

Almost surely, 2^42830989 is an apocalyptic number.

It is an amenable number.

42830989 is a deficient number, since it is larger than the sum of its proper divisors (1).

42830989 is an equidigital number, since it uses as much as digits as its factorization.

42830989 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 124416, while the sum is 43.

The square root of 42830989 is about 6544.5388684001. The cubic root of 42830989 is about 349.8802011765.

The spelling of 42830989 in words is "forty-two million, eight hundred thirty thousand, nine hundred eighty-nine".