87341621 has 2 divisors, whose sum is σ = 87341622. Its totient is φ = 87341620.

The previous prime is 87341599. The next prime is 87341627. The reversal of 87341621 is 12614378.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 74200996 + 13140625 = 8614^2 + 3625^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-87341621 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (87341627) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 43670810 + 43670811.

It is an arithmetic number, because the mean of its divisors is an integer number (43670811).

Almost surely, 2^87341621 is an apocalyptic number.

It is an amenable number.

87341621 is a deficient number, since it is larger than the sum of its proper divisors (1).

87341621 is an equidigital number, since it uses as much as digits as its factorization.

87341621 is an evil number, because the sum of its binary digits is even.

The product of its digits is 8064, while the sum is 32.

The square root of 87341621 is about 9345.6739189852. The cubic root of 87341621 is about 443.6839812915.

Adding to 87341621 its reverse (12614378), we get a palindrome (99955999).

The spelling of 87341621 in words is "eighty-seven million, three hundred forty-one thousand, six hundred twenty-one".