487505189 has 2 divisors, whose sum is σ = 487505190. Its totient is φ = 487505188.

The previous prime is 487505159. The next prime is 487505191. The reversal of 487505189 is 981505784.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 442050625 + 45454564 = 21025^2 + 6742^2 .

It is a cyclic number.

It is not a de Polignac number, because 487505189 - 2¹² = 487501093 is a prime.

It is a super-2 number, since 2×487505189² = 475322618603851442, which contains 22 as substring.

Together with 487505191, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (487505119) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 243752594 + 243752595.

It is an arithmetic number, because the mean of its divisors is an integer number (243752595).

Almost surely, 2^487505189 is an apocalyptic number.

It is an amenable number.

487505189 is a deficient number, since it is larger than the sum of its proper divisors (1).

487505189 is an equidigital number, since it uses as much as digits as its factorization.

487505189 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 403200, while the sum is 47.

The square root of 487505189 is about 22079.5196732175. The cubic root of 487505189 is about 787.0332507168.

The spelling of 487505189 in words is "four hundred eighty-seven million, five hundred five thousand, one hundred eighty-nine".