55686457 has 2 divisors, whose sum is σ = 55686458. Its totient is φ = 55686456.

The previous prime is 55686437. The next prime is 55686523. The reversal of 55686457 is 75468655.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 32444416 + 23242041 = 5696^2 + 4821^2 .

It is a cyclic number.

It is not a de Polignac number, because 55686457 - 2⁷ = 55686329 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (55686437) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27843228 + 27843229.

It is an arithmetic number, because the mean of its divisors is an integer number (27843229).

Almost surely, 2^55686457 is an apocalyptic number.

It is an amenable number.

55686457 is a deficient number, since it is larger than the sum of its proper divisors (1).

55686457 is an equidigital number, since it uses as much as digits as its factorization.

55686457 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1008000, while the sum is 46.

The square root of 55686457 is about 7462.3358943430. The cubic root of 55686457 is about 381.8708686090.

The spelling of 55686457 in words is "fifty-five million, six hundred eighty-six thousand, four hundred fifty-seven".