87550549 has 2 divisors, whose sum is σ = 87550550. Its totient is φ = 87550548.

The previous prime is 87550531. The next prime is 87550553. The reversal of 87550549 is 94505578.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 79388100 + 8162449 = 8910^2 + 2857^2 .

It is a cyclic number.

It is not a de Polignac number, because 87550549 - 2⁹ = 87550037 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (87550349) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 43775274 + 43775275.

It is an arithmetic number, because the mean of its divisors is an integer number (43775275).

Almost surely, 2^87550549 is an apocalyptic number.

It is an amenable number.

87550549 is a deficient number, since it is larger than the sum of its proper divisors (1).

87550549 is an equidigital number, since it uses as much as digits as its factorization.

87550549 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 252000, while the sum is 43.

The square root of 87550549 is about 9356.8450345188. The cubic root of 87550549 is about 444.0374751936.

It can be divided in two parts, 8 and 7550549, that added together give a palindrome (7550557).

The spelling of 87550549 in words is "eighty-seven million, five hundred fifty thousand, five hundred forty-nine".