487621909 has 16 divisors (see below), whose sum is σ = 531048960. Its totient is φ = 446040000.

The previous prime is 487621907. The next prime is 487621943. The reversal of 487621909 is 909126784.

It is a cyclic number.

It is not a de Polignac number, because 487621909 - 2¹ = 487621907 is a prime.

It is a super-2 number, since 2×487621909² = 475550252273608562, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (487621903) 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 in 15 ways as a sum of consecutive naturals, for example, 412299 + ... + 413479.

It is an arithmetic number, because the mean of its divisors is an integer number (33190560).

Almost surely, 2^487621909 is an apocalyptic number.

It is an amenable number.

487621909 is a deficient number, since it is larger than the sum of its proper divisors (43427051).

487621909 is a wasteful number, since it uses less digits than its factorization.

487621909 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1932.

The product of its (nonzero) digits is 217728, while the sum is 46.

The square root of 487621909 is about 22082.1626884687. The cubic root of 487621909 is about 787.0960570162.

The spelling of 487621909 in words is "four hundred eighty-seven million, six hundred twenty-one thousand, nine hundred nine".