87430489 has 2 divisors, whose sum is σ = 87430490. Its totient is φ = 87430488.

The previous prime is 87430487. The next prime is 87430513. The reversal of 87430489 is 98403478.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 59552089 + 27878400 = 7717^2 + 5280^2 .

It is a cyclic number.

It is not a de Polignac number, because 87430489 - 2¹ = 87430487 is a prime.

Together with 87430487, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (87430487) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 43715244 + 43715245.

It is an arithmetic number, because the mean of its divisors is an integer number (43715245).

Almost surely, 2^87430489 is an apocalyptic number.

It is an amenable number.

87430489 is a deficient number, since it is larger than the sum of its proper divisors (1).

87430489 is an equidigital number, since it uses as much as digits as its factorization.

87430489 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 193536, while the sum is 43.

The square root of 87430489 is about 9350.4272094916. The cubic root of 87430489 is about 443.8344095461.

The spelling of 87430489 in words is "eighty-seven million, four hundred thirty thousand, four hundred eighty-nine".