87729293 has 2 divisors, whose sum is σ = 87729294. Its totient is φ = 87729292.

The previous prime is 87729281. The next prime is 87729359. The reversal of 87729293 is 39292778.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 44983849 + 42745444 = 6707^2 + 6538^2 .

It is a cyclic number.

It is not a de Polignac number, because 87729293 - 2¹⁶ = 87663757 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (87729203) 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, 43864646 + 43864647.

It is an arithmetic number, because the mean of its divisors is an integer number (43864647).

Almost surely, 2^87729293 is an apocalyptic number.

It is an amenable number.

87729293 is a deficient number, since it is larger than the sum of its proper divisors (1).

87729293 is an equidigital number, since it uses as much as digits as its factorization.

87729293 is an odious number, because the sum of its binary digits is odd.

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

The square root of 87729293 is about 9366.3916744924. The cubic root of 87729293 is about 444.3394534337.

The spelling of 87729293 in words is "eighty-seven million, seven hundred twenty-nine thousand, two hundred ninety-three".