87143533 has 2 divisors, whose sum is σ = 87143534. Its totient is φ = 87143532.

The previous prime is 87143477. The next prime is 87143543. The reversal of 87143533 is 33534178.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 74597769 + 12545764 = 8637^2 + 3542^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-87143533 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (87143543) by changing a digit.

It is a good prime.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 43571766 + 43571767.

It is an arithmetic number, because the mean of its divisors is an integer number (43571767).

Almost surely, 2^87143533 is an apocalyptic number.

It is an amenable number.

87143533 is a deficient number, since it is larger than the sum of its proper divisors (1).

87143533 is an equidigital number, since it uses as much as digits as its factorization.

87143533 is an evil number, because the sum of its binary digits is even.

The product of its digits is 30240, while the sum is 34.

The square root of 87143533 is about 9335.0700586552. The cubic root of 87143533 is about 443.3483070426.

The spelling of 87143533 in words is "eighty-seven million, one hundred forty-three thousand, five hundred thirty-three".