87341021 has 2 divisors, whose sum is σ = 87341022. Its totient is φ = 87341020.

The previous prime is 87341017. The next prime is 87341027. The reversal of 87341021 is 12014378.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 68244121 + 19096900 = 8261^2 + 4370^2 .

It is a cyclic number.

It is not a de Polignac number, because 87341021 - 2² = 87341017 is a prime.

It is a super-5 number, since 5×87341021⁵ (a number of 41 digits) contains 55555 as substring.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (87341027) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 43670510 + 43670511.

It is an arithmetic number, because the mean of its divisors is an integer number (43670511).

Almost surely, 2^87341021 is an apocalyptic number.

It is an amenable number.

87341021 is a deficient number, since it is larger than the sum of its proper divisors (1).

87341021 is an equidigital number, since it uses as much as digits as its factorization.

87341021 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1344, while the sum is 26.

The square root of 87341021 is about 9345.6418185163. The cubic root of 87341021 is about 443.6829653154.

Adding to 87341021 its reverse (12014378), we get a palindrome (99355399).

The spelling of 87341021 in words is "eighty-seven million, three hundred forty-one thousand, twenty-one".