87944533 has 2 divisors, whose sum is σ = 87944534. Its totient is φ = 87944532.

The previous prime is 87944497. The next prime is 87944537. The reversal of 87944533 is 33544978.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 77563249 + 10381284 = 8807^2 + 3222^2 .

It is a cyclic number.

It is not a de Polignac number, because 87944533 - 2¹³ = 87936341 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 87944533.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (87944537) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 43972266 + 43972267.

It is an arithmetic number, because the mean of its divisors is an integer number (43972267).

Almost surely, 2^87944533 is an apocalyptic number.

It is an amenable number.

87944533 is a deficient number, since it is larger than the sum of its proper divisors (1).

87944533 is an equidigital number, since it uses as much as digits as its factorization.

87944533 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 362880, while the sum is 43.

The square root of 87944533 is about 9377.8746526065. The cubic root of 87944533 is about 444.7025458181.

The spelling of 87944533 in words is "eighty-seven million, nine hundred forty-four thousand, five hundred thirty-three".