87204919447 has 2 divisors, whose sum is σ = 87204919448. Its totient is φ = 87204919446.

The previous prime is 87204919421. The next prime is 87204919453. The reversal of 87204919447 is 74491940278.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 87204919447 - 2¹⁵ = 87204886679 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (87204919247) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 43602459723 + 43602459724.

It is an arithmetic number, because the mean of its divisors is an integer number (43602459724).

Almost surely, 2^87204919447 is an apocalyptic number.

87204919447 is a deficient number, since it is larger than the sum of its proper divisors (1).

87204919447 is an equidigital number, since it uses as much as digits as its factorization.

87204919447 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4064256, while the sum is 55.

The spelling of 87204919447 in words is "eighty-seven billion, two hundred four million, nine hundred nineteen thousand, four hundred forty-seven".