105554987 has 2 divisors, whose sum is σ = 105554988. Its totient is φ = 105554986.

The previous prime is 105554957. The next prime is 105555011. The reversal of 105554987 is 789455501.

It is a strong prime.

It is an emirp because it is prime and its reverse (789455501) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 105554987 - 2⁶ = 105554923 is a prime.

It is a super-2 number, since 2×105554987² = 22283710561140338, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (105554947) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 52777493 + 52777494.

It is an arithmetic number, because the mean of its divisors is an integer number (52777494).

Almost surely, 2^105554987 is an apocalyptic number.

105554987 is a deficient number, since it is larger than the sum of its proper divisors (1).

105554987 is an equidigital number, since it uses as much as digits as its factorization.

105554987 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 252000, while the sum is 44.

The square root of 105554987 is about 10273.9956686773. The cubic root of 105554987 is about 472.5991311468.

The spelling of 105554987 in words is "one hundred five million, five hundred fifty-four thousand, nine hundred eighty-seven".