87544909 has 2 divisors, whose sum is σ = 87544910. Its totient is φ = 87544908.

The previous prime is 87544889. The next prime is 87544949. The reversal of 87544909 is 90944578.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 82355625 + 5189284 = 9075^2 + 2278^2 .

It is a cyclic number.

It is not a de Polignac number, because 87544909 - 2⁹ = 87544397 is a prime.

It is a super-2 number, since 2×87544909² = 15328222183636562, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (87544949) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 43772454 + 43772455.

It is an arithmetic number, because the mean of its divisors is an integer number (43772455).

Almost surely, 2^87544909 is an apocalyptic number.

It is an amenable number.

87544909 is a deficient number, since it is larger than the sum of its proper divisors (1).

87544909 is an equidigital number, since it uses as much as digits as its factorization.

87544909 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 362880, while the sum is 46.

The square root of 87544909 is about 9356.5436460266. The cubic root of 87544909 is about 444.0279400349.

The spelling of 87544909 in words is "eighty-seven million, five hundred forty-four thousand, nine hundred nine".