87109408369 has 2 divisors, whose sum is σ = 87109408370. Its totient is φ = 87109408368.

The previous prime is 87109408343. The next prime is 87109408453. The reversal of 87109408369 is 96380490178.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 87095814400 + 13593969 = 295120^2 + 3687^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-87109408369 is a prime.

It is a super-2 number, since 2×87109408369² (a number of 23 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (87109408339) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 43554704184 + 43554704185.

It is an arithmetic number, because the mean of its divisors is an integer number (43554704185).

Almost surely, 2^87109408369 is an apocalyptic number.

It is an amenable number.

87109408369 is a deficient number, since it is larger than the sum of its proper divisors (1).

87109408369 is an equidigital number, since it uses as much as digits as its factorization.

87109408369 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2612736, while the sum is 55.

The spelling of 87109408369 in words is "eighty-seven billion, one hundred nine million, four hundred eight thousand, three hundred sixty-nine".