56687869 has 8 divisors (see below), whose sum is σ = 64832768. Its totient is φ = 48554640.

The previous prime is 56687863. The next prime is 56687879. The reversal of 56687869 is 96878665.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 56687869 - 2⁹ = 56687357 is a prime.

It is a super-2 number, since 2×56687869² = 6427028983522322, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (56687863) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 14239 + ... + 17779.

It is an arithmetic number, because the mean of its divisors is an integer number (8104096).

Almost surely, 2^56687869 is an apocalyptic number.

It is an amenable number.

56687869 is a deficient number, since it is larger than the sum of its proper divisors (8144899).

56687869 is a wasteful number, since it uses less digits than its factorization.

56687869 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5835.

The product of its digits is 4354560, while the sum is 55.

The square root of 56687869 is about 7529.1346780357. The cubic root of 56687869 is about 384.1463494718.

The spelling of 56687869 in words is "fifty-six million, six hundred eighty-seven thousand, eight hundred sixty-nine".