55687903 has 8 divisors (see below), whose sum is σ = 60219072. Its totient is φ = 51296256.

The previous prime is 55687889. The next prime is 55687909. The reversal of 55687903 is 30978655.

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 55687903 - 2⁵ = 55687871 is a prime.

It is a super-2 number, since 2×55687903² = 6202285081074818, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 55687903.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55687909) 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, 34050 + ... + 35647.

It is an arithmetic number, because the mean of its divisors is an integer number (7527384).

Almost surely, 2^55687903 is an apocalyptic number.

55687903 is a deficient number, since it is larger than the sum of its proper divisors (4531169).

55687903 is a wasteful number, since it uses less digits than its factorization.

55687903 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 69761.

The product of its (nonzero) digits is 226800, while the sum is 43.

The square root of 55687903 is about 7462.4327802668. The cubic root of 55687903 is about 381.8741739040.

The spelling of 55687903 in words is "fifty-five million, six hundred eighty-seven thousand, nine hundred three".