87440131733 has 2 divisors, whose sum is σ = 87440131734. Its totient is φ = 87440131732.

The previous prime is 87440131697. The next prime is 87440131747. The reversal of 87440131733 is 33713104478.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 76619347204 + 10820784529 = 276802^2 + 104023^2 .

It is a cyclic number.

It is not a de Polignac number, because 87440131733 - 2²⁰ = 87439083157 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (87440139733) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 43720065866 + 43720065867.

It is an arithmetic number, because the mean of its divisors is an integer number (43720065867).

Almost surely, 2^87440131733 is an apocalyptic number.

It is an amenable number.

87440131733 is a deficient number, since it is larger than the sum of its proper divisors (1).

87440131733 is an equidigital number, since it uses as much as digits as its factorization.

87440131733 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 169344, while the sum is 41.

The spelling of 87440131733 in words is "eighty-seven billion, four hundred forty million, one hundred thirty-one thousand, seven hundred thirty-three".