87049973 has 2 divisors, whose sum is σ = 87049974. Its totient is φ = 87049972.

The previous prime is 87049927. The next prime is 87049993. The reversal of 87049973 is 37994078.

87049973 is nontrivially palindromic in base 9.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 60248644 + 26801329 = 7762^2 + 5177^2 .

It is a cyclic number.

It is not a de Polignac number, because 87049973 - 2⁸ = 87049717 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (87049913) 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, 43524986 + 43524987.

It is an arithmetic number, because the mean of its divisors is an integer number (43524987).

Almost surely, 2^87049973 is an apocalyptic number.

It is an amenable number.

87049973 is a deficient number, since it is larger than the sum of its proper divisors (1).

87049973 is an equidigital number, since it uses as much as digits as its factorization.

87049973 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 381024, while the sum is 47.

The square root of 87049973 is about 9330.0575025023. The cubic root of 87049973 is about 443.1895860618.

The spelling of 87049973 in words is "eighty-seven million, forty-nine thousand, nine hundred seventy-three".