53456987 has 2 divisors, whose sum is σ = 53456988. Its totient is φ = 53456986.

The previous prime is 53456983. The next prime is 53456999. The reversal of 53456987 is 78965435.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 53456987 - 2² = 53456983 is a prime.

It is not a weakly prime, because it can be changed into another prime (53456983) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 26728493 + 26728494.

It is an arithmetic number, because the mean of its divisors is an integer number (26728494).

Almost surely, 2^53456987 is an apocalyptic number.

53456987 is a deficient number, since it is larger than the sum of its proper divisors (1).

53456987 is an equidigital number, since it uses as much as digits as its factorization.

53456987 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 907200, while the sum is 47.

The square root of 53456987 is about 7311.4285197901. The cubic root of 53456987 is about 376.7050934074.

The spelling of 53456987 in words is "fifty-three million, four hundred fifty-six thousand, nine hundred eighty-seven".