87225709 has 2 divisors, whose sum is σ = 87225710. Its totient is φ = 87225708.

The previous prime is 87225673. The next prime is 87225767. The reversal of 87225709 is 90752278.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 44689225 + 42536484 = 6685^2 + 6522^2 .

It is a cyclic number.

It is not a de Polignac number, because 87225709 - 2⁷ = 87225581 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (87225769) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 43612854 + 43612855.

It is an arithmetic number, because the mean of its divisors is an integer number (43612855).

Almost surely, 2^87225709 is an apocalyptic number.

It is an amenable number.

87225709 is a deficient number, since it is larger than the sum of its proper divisors (1).

87225709 is an equidigital number, since it uses as much as digits as its factorization.

87225709 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 70560, while the sum is 40.

The square root of 87225709 is about 9339.4704882022. The cubic root of 87225709 is about 443.4876218155.

The spelling of 87225709 in words is "eighty-seven million, two hundred twenty-five thousand, seven hundred nine".