87184372897 has 2 divisors, whose sum is σ = 87184372898. Its totient is φ = 87184372896.

The previous prime is 87184372867. The next prime is 87184372901. The reversal of 87184372897 is 79827348178.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 69232660641 + 17951712256 = 263121^2 + 133984^2 .

It is a cyclic number.

It is not a de Polignac number, because 87184372897 - 2²³ = 87175984289 is a prime.

It is a super-2 number, since 2×87184372897² (a number of 23 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (87184372867) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 43592186448 + 43592186449.

It is an arithmetic number, because the mean of its divisors is an integer number (43592186449).

Almost surely, 2^87184372897 is an apocalyptic number.

It is an amenable number.

87184372897 is a deficient number, since it is larger than the sum of its proper divisors (1).

87184372897 is an equidigital number, since it uses as much as digits as its factorization.

87184372897 is an evil number, because the sum of its binary digits is even.

The product of its digits is 37933056, while the sum is 64.

The spelling of 87184372897 in words is "eighty-seven billion, one hundred eighty-four million, three hundred seventy-two thousand, eight hundred ninety-seven".