87624189397 has 2 divisors, whose sum is σ = 87624189398. Its totient is φ = 87624189396.

The previous prime is 87624189383. The next prime is 87624189407. The reversal of 87624189397 is 79398142678.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 76743404676 + 10880784721 = 277026^2 + 104311^2 .

It is a cyclic number.

It is not a de Polignac number, because 87624189397 - 2¹⁹ = 87623665109 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (87624189347) 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, 43812094698 + 43812094699.

It is an arithmetic number, because the mean of its divisors is an integer number (43812094699).

Almost surely, 2^87624189397 is an apocalyptic number.

It is an amenable number.

87624189397 is a deficient number, since it is larger than the sum of its proper divisors (1).

87624189397 is an equidigital number, since it uses as much as digits as its factorization.

87624189397 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 36578304, while the sum is 64.

The spelling of 87624189397 in words is "eighty-seven billion, six hundred twenty-four million, one hundred eighty-nine thousand, three hundred ninety-seven".