87550553 has 2 divisors, whose sum is σ = 87550554. Its totient is φ = 87550552.

The previous prime is 87550549. The next prime is 87550583. The reversal of 87550553 is 35505578.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 77387209 + 10163344 = 8797^2 + 3188^2 .

It is a cyclic number.

It is not a de Polignac number, because 87550553 - 2² = 87550549 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (87550583) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 43775276 + 43775277.

It is an arithmetic number, because the mean of its divisors is an integer number (43775277).

Almost surely, 2^87550553 is an apocalyptic number.

It is an amenable number.

87550553 is a deficient number, since it is larger than the sum of its proper divisors (1).

87550553 is an equidigital number, since it uses as much as digits as its factorization.

87550553 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 105000, while the sum is 38.

The square root of 87550553 is about 9356.8452482661. The cubic root of 87550553 is about 444.0374819560.

The spelling of 87550553 in words is "eighty-seven million, five hundred fifty thousand, five hundred fifty-three".