53278687 has 8 divisors (see below), whose sum is σ = 66425472. Its totient is φ = 41515800.

The previous prime is 53278661. The next prime is 53278703. The reversal of 53278687 is 78687235.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-53278687 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 (53278657) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 345889 + ... + 346042.

It is an arithmetic number, because the mean of its divisors is an integer number (8303184).

Almost surely, 2^53278687 is an apocalyptic number.

53278687 is a deficient number, since it is larger than the sum of its proper divisors (13146785).

53278687 is a wasteful number, since it uses less digits than its factorization.

53278687 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 691949.

The product of its digits is 564480, while the sum is 46.

The square root of 53278687 is about 7299.2250958578. The cubic root of 53278687 is about 376.2858071976.

The spelling of 53278687 in words is "fifty-three million, two hundred seventy-eight thousand, six hundred eighty-seven".