87292109 has 2 divisors, whose sum is σ = 87292110. Its totient is φ = 87292108.

The previous prime is 87292091. The next prime is 87292133. The reversal of 87292109 is 90129278.

Together with previous prime (87292091) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 70930084 + 16362025 = 8422^2 + 4045^2 .

It is a cyclic number.

It is not a de Polignac number, because 87292109 - 2²⁴ = 70514893 is a prime.

It is a Chen prime.

It is an alternating number because its digits alternate between even and odd.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (87292189) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 43646054 + 43646055.

It is an arithmetic number, because the mean of its divisors is an integer number (43646055).

Almost surely, 2^87292109 is an apocalyptic number.

It is an amenable number.

87292109 is a deficient number, since it is larger than the sum of its proper divisors (1).

87292109 is an equidigital number, since it uses as much as digits as its factorization.

87292109 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 18144, while the sum is 38.

The square root of 87292109 is about 9343.0246173282. The cubic root of 87292109 is about 443.6001272887.

The spelling of 87292109 in words is "eighty-seven million, two hundred ninety-two thousand, one hundred nine".