1687484241 has 9 divisors (see below), whose sum is σ = 2437655259. Its totient is φ = 1124907336.

The previous prime is 1687484207. The next prime is 1687484251. The reversal of 1687484241 is 1424847861.

The square root of 1687484241 is 41079.

It is a perfect power (a square), and thus also a powerful number.

1687484241 is a `hidden beast` number, since 168 + 7 + 484 + 2 + 4 + 1 = 666.

It can be written as a sum of positive squares in only one way, i.e., 1685513025 + 1971216 = 41055^2 + 1404^2 .

It is a tau number, because it is divible by the number of its divisors (9).

It is not a de Polignac number, because 1687484241 - 2¹⁷ = 1687353169 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1687484251) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 116391 + ... + 130083.

Almost surely, 2^1687484241 is an apocalyptic number.

1687484241 is the 41079-th square number.

1687484241 is the 20540-th centered octagonal number.

It is an amenable number.

1687484241 is a deficient number, since it is larger than the sum of its proper divisors (750171018).

1687484241 is an frugal number, since it uses more digits than its factorization.

1687484241 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27392 (or 13696 counting only the distinct ones).

The product of its digits is 344064, while the sum is 45.

The cubic root of 1687484241 is about 1190.5470829123.

The spelling of 1687484241 in words is "one billion, six hundred eighty-seven million, four hundred eighty-four thousand, two hundred forty-one".