87273409 has 2 divisors, whose sum is σ = 87273410. Its totient is φ = 87273408.

The previous prime is 87273397. The next prime is 87273437. The reversal of 87273409 is 90437278.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 74649600 + 12623809 = 8640^2 + 3553^2 .

It is a cyclic number.

It is not a de Polignac number, because 87273409 - 2⁹ = 87272897 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (87273469) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 43636704 + 43636705.

It is an arithmetic number, because the mean of its divisors is an integer number (43636705).

Almost surely, 2^87273409 is an apocalyptic number.

It is an amenable number.

87273409 is a deficient number, since it is larger than the sum of its proper divisors (1).

87273409 is an equidigital number, since it uses as much as digits as its factorization.

87273409 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 84672, while the sum is 40.

The square root of 87273409 is about 9342.0238171394. The cubic root of 87273409 is about 443.5684485383.

The spelling of 87273409 in words is "eighty-seven million, two hundred seventy-three thousand, four hundred nine".