87341921 has 2 divisors, whose sum is σ = 87341922. Its totient is φ = 87341920.

The previous prime is 87341899. The next prime is 87341953. The reversal of 87341921 is 12914378.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 79299025 + 8042896 = 8905^2 + 2836^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-87341921 is a prime.

It is a super-2 number, since 2×87341921² = 15257222327940482, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (87341021) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 43670960 + 43670961.

It is an arithmetic number, because the mean of its divisors is an integer number (43670961).

Almost surely, 2^87341921 is an apocalyptic number.

It is an amenable number.

87341921 is a deficient number, since it is larger than the sum of its proper divisors (1).

87341921 is an equidigital number, since it uses as much as digits as its factorization.

87341921 is an evil number, because the sum of its binary digits is even.

The product of its digits is 12096, while the sum is 35.

The square root of 87341921 is about 9345.6899691783. The cubic root of 87341921 is about 443.6844892778.

The spelling of 87341921 in words is "eighty-seven million, three hundred forty-one thousand, nine hundred twenty-one".