87471893 has 2 divisors, whose sum is σ = 87471894. Its totient is φ = 87471892.

The previous prime is 87471887. The next prime is 87471899. The reversal of 87471893 is 39817478.

It is a balanced prime because it is at equal distance from previous prime (87471887) and next prime (87471899).

It can be written as a sum of positive squares in only one way, i.e., 83302129 + 4169764 = 9127^2 + 2042^2 .

It is a cyclic number.

It is not a de Polignac number, because 87471893 - 2¹⁶ = 87406357 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (87471899) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 43735946 + 43735947.

It is an arithmetic number, because the mean of its divisors is an integer number (43735947).

Almost surely, 2^87471893 is an apocalyptic number.

It is an amenable number.

87471893 is a deficient number, since it is larger than the sum of its proper divisors (1).

87471893 is an equidigital number, since it uses as much as digits as its factorization.

87471893 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 338688, while the sum is 47.

The square root of 87471893 is about 9352.6409639203. The cubic root of 87471893 is about 443.9044599371.

The spelling of 87471893 in words is "eighty-seven million, four hundred seventy-one thousand, eight hundred ninety-three".