87390309241 has 2 divisors, whose sum is σ = 87390309242. Its totient is φ = 87390309240.

The previous prime is 87390309211. The next prime is 87390309257. The reversal of 87390309241 is 14290309378.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 59636082025 + 27754227216 = 244205^2 + 166596^2 .

It is a cyclic number.

It is not a de Polignac number, because 87390309241 - 2⁹ = 87390308729 is a prime.

It is a super-2 number, since 2×87390309241² (a number of 23 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 87390309191 and 87390309200.

It is not a weakly prime, because it can be changed into another prime (87390309211) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 43695154620 + 43695154621.

It is an arithmetic number, because the mean of its divisors is an integer number (43695154621).

Almost surely, 2^87390309241 is an apocalyptic number.

It is an amenable number.

87390309241 is a deficient number, since it is larger than the sum of its proper divisors (1).

87390309241 is an equidigital number, since it uses as much as digits as its factorization.

87390309241 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 326592, while the sum is 46.

The spelling of 87390309241 in words is "eighty-seven billion, three hundred ninety million, three hundred nine thousand, two hundred forty-one".