87145624427 has 2 divisors, whose sum is σ = 87145624428. Its totient is φ = 87145624426.

The previous prime is 87145624381. The next prime is 87145624441. The reversal of 87145624427 is 72442654178.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 87145624427 - 2⁸ = 87145624171 is a prime.

It is not a weakly prime, because it can be changed into another prime (87145626427) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 43572812213 + 43572812214.

It is an arithmetic number, because the mean of its divisors is an integer number (43572812214).

Almost surely, 2^87145624427 is an apocalyptic number.

87145624427 is a deficient number, since it is larger than the sum of its proper divisors (1).

87145624427 is an equidigital number, since it uses as much as digits as its factorization.

87145624427 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3010560, while the sum is 50.

The spelling of 87145624427 in words is "eighty-seven billion, one hundred forty-five million, six hundred twenty-four thousand, four hundred twenty-seven".