87684241 has 2 divisors, whose sum is σ = 87684242. Its totient is φ = 87684240.

The previous prime is 87684239. The next prime is 87684277. The reversal of 87684241 is 14248678.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 87329025 + 355216 = 9345^2 + 596^2 .

It is a cyclic number.

It is not a de Polignac number, because 87684241 - 2¹ = 87684239 is a prime.

It is a super-2 number, since 2×87684241² = 15377052239492162, which contains 22 as substring.

Together with 87684239, it forms a pair of twin primes.

It is a junction number, because it is equal to n+sod(n) for n = 87684194 and 87684203.

It is not a weakly prime, because it can be changed into another prime (87684041) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 43842120 + 43842121.

It is an arithmetic number, because the mean of its divisors is an integer number (43842121).

Almost surely, 2^87684241 is an apocalyptic number.

It is an amenable number.

87684241 is a deficient number, since it is larger than the sum of its proper divisors (1).

87684241 is an equidigital number, since it uses as much as digits as its factorization.

87684241 is an evil number, because the sum of its binary digits is even.

The product of its digits is 86016, while the sum is 40.

The square root of 87684241 is about 9363.9863840140. The cubic root of 87684241 is about 444.2633792284.

The spelling of 87684241 in words is "eighty-seven million, six hundred eighty-four thousand, two hundred forty-one".