87186188273 has 2 divisors, whose sum is σ = 87186188274. Its totient is φ = 87186188272.

The previous prime is 87186188267. The next prime is 87186188291. The reversal of 87186188273 is 37288168178.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 82657975009 + 4528213264 = 287503^2 + 67292^2 .

It is a cyclic number.

It is not a de Polignac number, because 87186188273 - 2⁶ = 87186188209 is a prime.

It is not a weakly prime, because it can be changed into another prime (87186188203) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 43593094136 + 43593094137.

It is an arithmetic number, because the mean of its divisors is an integer number (43593094137).

Almost surely, 2^87186188273 is an apocalyptic number.

It is an amenable number.

87186188273 is a deficient number, since it is larger than the sum of its proper divisors (1).

87186188273 is an equidigital number, since it uses as much as digits as its factorization.

87186188273 is an evil number, because the sum of its binary digits is even.

The product of its digits is 7225344, while the sum is 59.

The spelling of 87186188273 in words is "eighty-seven billion, one hundred eighty-six million, one hundred eighty-eight thousand, two hundred seventy-three".