87043849 has 2 divisors, whose sum is σ = 87043850. Its totient is φ = 87043848.

The previous prime is 87043777. The next prime is 87043903. The reversal of 87043849 is 94834078.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 81721600 + 5322249 = 9040^2 + 2307^2 .

It is a cyclic number.

It is not a de Polignac number, because 87043849 - 2⁹ = 87043337 is a prime.

It is not a weakly prime, because it can be changed into another prime (87043949) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 43521924 + 43521925.

It is an arithmetic number, because the mean of its divisors is an integer number (43521925).

Almost surely, 2^87043849 is an apocalyptic number.

It is an amenable number.

87043849 is a deficient number, since it is larger than the sum of its proper divisors (1).

87043849 is an equidigital number, since it uses as much as digits as its factorization.

87043849 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 193536, while the sum is 43.

The square root of 87043849 is about 9329.7293101140. The cubic root of 87043849 is about 443.1791929639.

The spelling of 87043849 in words is "eighty-seven million, forty-three thousand, eight hundred forty-nine".