87277009 has 2 divisors, whose sum is σ = 87277010. Its totient is φ = 87277008.

The previous prime is 87277007. The next prime is 87277027. The reversal of 87277009 is 90077278.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 65561409 + 21715600 = 8097^2 + 4660^2 .

It is a cyclic number.

It is not a de Polignac number, because 87277009 - 2¹ = 87277007 is a prime.

Together with 87277007, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (87277007) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 43638504 + 43638505.

It is an arithmetic number, because the mean of its divisors is an integer number (43638505).

Almost surely, 2^87277009 is an apocalyptic number.

It is an amenable number.

87277009 is a deficient number, since it is larger than the sum of its proper divisors (1).

87277009 is an equidigital number, since it uses as much as digits as its factorization.

87277009 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 49392, while the sum is 40.

The square root of 87277009 is about 9342.2164928886. The cubic root of 87277009 is about 443.5745474730.

The spelling of 87277009 in words is "eighty-seven million, two hundred seventy-seven thousand, nine".