87624832489 has 2 divisors, whose sum is σ = 87624832490. Its totient is φ = 87624832488.

The previous prime is 87624832433. The next prime is 87624832501. The reversal of 87624832489 is 98423842678.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 69871934889 + 17752897600 = 264333^2 + 133240^2 .

It is a cyclic number.

It is not a de Polignac number, because 87624832489 - 2¹¹ = 87624830441 is a prime.

It is a super-2 number, since 2×87624832489² (a number of 23 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (87624836489) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 43812416244 + 43812416245.

It is an arithmetic number, because the mean of its divisors is an integer number (43812416245).

Almost surely, 2^87624832489 is an apocalyptic number.

It is an amenable number.

87624832489 is a deficient number, since it is larger than the sum of its proper divisors (1).

87624832489 is an equidigital number, since it uses as much as digits as its factorization.

87624832489 is an evil number, because the sum of its binary digits is even.

The product of its digits is 37158912, while the sum is 61.

The spelling of 87624832489 in words is "eighty-seven billion, six hundred twenty-four million, eight hundred thirty-two thousand, four hundred eighty-nine".