87753221 has 2 divisors, whose sum is σ = 87753222. Its totient is φ = 87753220.

The previous prime is 87753203. The next prime is 87753241. The reversal of 87753221 is 12235778.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 67404100 + 20349121 = 8210^2 + 4511^2 .

It is a cyclic number.

It is not a de Polignac number, because 87753221 - 2¹⁴ = 87736837 is a prime.

It is a Chen prime.

It is equal to p_5094296 and since 87753221 and 5094296 have the same sum of digits, it is a Honaker prime.

It is a nialpdrome in base 10.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (87753241) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 43876610 + 43876611.

It is an arithmetic number, because the mean of its divisors is an integer number (43876611).

Almost surely, 2^87753221 is an apocalyptic number.

It is an amenable number.

87753221 is a deficient number, since it is larger than the sum of its proper divisors (1).

87753221 is an equidigital number, since it uses as much as digits as its factorization.

87753221 is an evil number, because the sum of its binary digits is even.

The product of its digits is 23520, while the sum is 35.

The square root of 87753221 is about 9367.6689202811. The cubic root of 87753221 is about 444.3798473455.

Adding to 87753221 its reverse (12235778), we get a palindrome (99988999).

The spelling of 87753221 in words is "eighty-seven million, seven hundred fifty-three thousand, two hundred twenty-one".