487669221 has 16 divisors (see below), whose sum is σ = 778048320. Its totient is φ = 300103920.

The previous prime is 487669141. The next prime is 487669229. The reversal of 487669221 is 122966784.

It is a happy number.

487669221 is a `hidden beast` number, since 487 + 66 + 92 + 21 = 666.

It is not a de Polignac number, because 487669221 - 2⁷ = 487669093 is a prime.

It is a super-2 number, since 2×487669221² = 475642538221493682, which contains 22 as substring.

It is a Smith number, since the sum of its digits (45) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (487669229) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 694335 + ... + 695036.

It is an arithmetic number, because the mean of its divisors is an integer number (48628020).

Almost surely, 2^487669221 is an apocalyptic number.

It is an amenable number.

487669221 is a deficient number, since it is larger than the sum of its proper divisors (290379099).

487669221 is a wasteful number, since it uses less digits than its factorization.

487669221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1389393 (or 1389387 counting only the distinct ones).

The product of its digits is 290304, while the sum is 45.

The square root of 487669221 is about 22083.2339343675. The cubic root of 487669221 is about 787.1215124519.

The spelling of 487669221 in words is "four hundred eighty-seven million, six hundred sixty-nine thousand, two hundred twenty-one".