87130273 has 2 divisors, whose sum is σ = 87130274. Its totient is φ = 87130272.

The previous prime is 87130259. The next prime is 87130291. The reversal of 87130273 is 37203178.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 85803169 + 1327104 = 9263^2 + 1152^2 .

It is a cyclic number.

It is not a de Polignac number, because 87130273 - 2⁹ = 87129761 is a prime.

It is not a weakly prime, because it can be changed into another prime (87170273) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 43565136 + 43565137.

It is an arithmetic number, because the mean of its divisors is an integer number (43565137).

Almost surely, 2^87130273 is an apocalyptic number.

It is an amenable number.

87130273 is a deficient number, since it is larger than the sum of its proper divisors (1).

87130273 is an equidigital number, since it uses as much as digits as its factorization.

87130273 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 7056, while the sum is 31.

The square root of 87130273 is about 9334.3598066498. The cubic root of 87130273 is about 443.3258188687.

The spelling of 87130273 in words is "eighty-seven million, one hundred thirty thousand, two hundred seventy-three".