87445123 has 2 divisors, whose sum is σ = 87445124. Its totient is φ = 87445122.

The previous prime is 87445109. The next prime is 87445153. The reversal of 87445123 is 32154478.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 87445123 - 2²⁵ = 53890691 is a prime.

It is not a weakly prime, because it can be changed into another prime (87445153) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 43722561 + 43722562.

It is an arithmetic number, because the mean of its divisors is an integer number (43722562).

Almost surely, 2^87445123 is an apocalyptic number.

87445123 is a deficient number, since it is larger than the sum of its proper divisors (1).

87445123 is an equidigital number, since it uses as much as digits as its factorization.

87445123 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 26880, while the sum is 34.

The square root of 87445123 is about 9351.2097078399. The cubic root of 87445123 is about 443.8591709708.

The spelling of 87445123 in words is "eighty-seven million, four hundred forty-five thousand, one hundred twenty-three".