105118987 has 2 divisors, whose sum is σ = 105118988. Its totient is φ = 105118986.

The previous prime is 105118969. The next prime is 105118991. The reversal of 105118987 is 789811501.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-105118987 is a prime.

It is a super-2 number, since 2×105118987² = 22100002855812338, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (105118927) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 52559493 + 52559494.

It is an arithmetic number, because the mean of its divisors is an integer number (52559494).

Almost surely, 2^105118987 is an apocalyptic number.

105118987 is a deficient number, since it is larger than the sum of its proper divisors (1).

105118987 is an equidigital number, since it uses as much as digits as its factorization.

105118987 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 20160, while the sum is 40.

The square root of 105118987 is about 10252.7550931445. The cubic root of 105118987 is about 471.9475352846.

The spelling of 105118987 in words is "one hundred five million, one hundred eighteen thousand, nine hundred eighty-seven".