87259202209 has 2 divisors, whose sum is σ = 87259202210. Its totient is φ = 87259202208.

The previous prime is 87259202183. The next prime is 87259202213. The reversal of 87259202209 is 90220295278.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 84526840225 + 2732361984 = 290735^2 + 52272^2 .

It is a cyclic number.

It is not a de Polignac number, because 87259202209 - 2¹³ = 87259194017 is a prime.

It is a super-2 number, since 2×87259202209² (a number of 23 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (87259202249) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 43629601104 + 43629601105.

It is an arithmetic number, because the mean of its divisors is an integer number (43629601105).

Almost surely, 2^87259202209 is an apocalyptic number.

It is an amenable number.

87259202209 is a deficient number, since it is larger than the sum of its proper divisors (1).

87259202209 is an equidigital number, since it uses as much as digits as its factorization.

87259202209 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 362880, while the sum is 46.

It can be divided in two parts, 87 and 259202209, that added together give a triangular number (259202296 = T₂₂₇₆₈).

The spelling of 87259202209 in words is "eighty-seven billion, two hundred fifty-nine million, two hundred two thousand, two hundred nine".