87260309 has 2 divisors, whose sum is σ = 87260310. Its totient is φ = 87260308.

The previous prime is 87260267. The next prime is 87260347. The reversal of 87260309 is 90306278.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 85562500 + 1697809 = 9250^2 + 1303^2 .

It is a cyclic number.

It is not a de Polignac number, because 87260309 - 2⁸ = 87260053 is a prime.

It is a super-2 number, since 2×87260309² = 15228723053550962, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (87260209) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 43630154 + 43630155.

It is an arithmetic number, because the mean of its divisors is an integer number (43630155).

Almost surely, 2^87260309 is an apocalyptic number.

It is an amenable number.

87260309 is a deficient number, since it is larger than the sum of its proper divisors (1).

87260309 is an equidigital number, since it uses as much as digits as its factorization.

87260309 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 18144, while the sum is 35.

The square root of 87260309 is about 9341.3226579537. The cubic root of 87260309 is about 443.5462537770.

The spelling of 87260309 in words is "eighty-seven million, two hundred sixty thousand, three hundred nine".