87268309 has 2 divisors, whose sum is σ = 87268310. Its totient is φ = 87268308.

The previous prime is 87268289. The next prime is 87268333. The reversal of 87268309 is 90386278.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 86545809 + 722500 = 9303^2 + 850^2 .

It is a cyclic number.

It is not a de Polignac number, because 87268309 - 2¹¹ = 87266261 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (87268339) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 43634154 + 43634155.

It is an arithmetic number, because the mean of its divisors is an integer number (43634155).

Almost surely, 2^87268309 is an apocalyptic number.

It is an amenable number.

87268309 is a deficient number, since it is larger than the sum of its proper divisors (1).

87268309 is an equidigital number, since it uses as much as digits as its factorization.

87268309 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 145152, while the sum is 43.

The square root of 87268309 is about 9341.7508530254. The cubic root of 87268309 is about 443.5598080937.

The spelling of 87268309 in words is "eighty-seven million, two hundred sixty-eight thousand, three hundred nine".