68561487 has 12 divisors (see below), whose sum is σ = 99131344. Its totient is φ = 45662400.

The previous prime is 68561483. The next prime is 68561497. The reversal of 68561487 is 78416586.

It is a happy number.

68561487 is a `hidden beast` number, since 6 + 8 + 561 + 4 + 87 = 666.

It is not a de Polignac number, because 68561487 - 2² = 68561483 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (68561483) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 7638 + ... + 13980.

Almost surely, 2^68561487 is an apocalyptic number.

68561487 is a deficient number, since it is larger than the sum of its proper divisors (30569857).

68561487 is a wasteful number, since it uses less digits than its factorization.

68561487 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7550 (or 7547 counting only the distinct ones).

The product of its digits is 322560, while the sum is 45.

The square root of 68561487 is about 8280.1864109451. The cubic root of 68561487 is about 409.2858617336.

The spelling of 68561487 in words is "sixty-eight million, five hundred sixty-one thousand, four hundred eighty-seven".