54856687 has 2 divisors, whose sum is σ = 54856688. Its totient is φ = 54856686.

The previous prime is 54856657. The next prime is 54856699. The reversal of 54856687 is 78665845.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 54856687 - 2⁷ = 54856559 is a prime.

It is a super-2 number, since 2×54856687² = 6018512217231938, which contains 22 as substring.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 54856687.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (54856657) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27428343 + 27428344.

It is an arithmetic number, because the mean of its divisors is an integer number (27428344).

Almost surely, 2^54856687 is an apocalyptic number.

54856687 is a deficient number, since it is larger than the sum of its proper divisors (1).

54856687 is an equidigital number, since it uses as much as digits as its factorization.

54856687 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1612800, while the sum is 49.

The square root of 54856687 is about 7406.5300242421. The cubic root of 54856687 is about 379.9646481425.

The spelling of 54856687 in words is "fifty-four million, eight hundred fifty-six thousand, six hundred eighty-seven".