87727229 has 2 divisors, whose sum is σ = 87727230. Its totient is φ = 87727228.

The previous prime is 87727219. The next prime is 87727231. The reversal of 87727229 is 92272778.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 70728100 + 16999129 = 8410^2 + 4123^2 .

It is a cyclic number.

It is not a de Polignac number, because 87727229 - 2⁸ = 87726973 is a prime.

It is a Sophie Germain prime.

Together with 87727231, it forms a pair of twin primes.

It is a Chen prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 87727229.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (87727219) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 43863614 + 43863615.

It is an arithmetic number, because the mean of its divisors is an integer number (43863615).

Almost surely, 2^87727229 is an apocalyptic number.

It is an amenable number.

87727229 is a deficient number, since it is larger than the sum of its proper divisors (1).

87727229 is an equidigital number, since it uses as much as digits as its factorization.

87727229 is an evil number, because the sum of its binary digits is even.

The product of its digits is 197568, while the sum is 44.

The square root of 87727229 is about 9366.2814926736. The cubic root of 87727229 is about 444.3359687603.

The spelling of 87727229 in words is "eighty-seven million, seven hundred twenty-seven thousand, two hundred twenty-nine".