105153987 has 4 divisors (see below), whose sum is σ = 140205320. Its totient is φ = 70102656.

The previous prime is 105153967. The next prime is 105153991. The reversal of 105153987 is 789351501.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 105153987 - 2⁸ = 105153731 is a prime.

It is a super-2 number, since 2×105153987² = 22114721963992338, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (105153967) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 17525662 + ... + 17525667.

It is an arithmetic number, because the mean of its divisors is an integer number (35051330).

Almost surely, 2^105153987 is an apocalyptic number.

105153987 is a deficient number, since it is larger than the sum of its proper divisors (35051333).

105153987 is an equidigital number, since it uses as much as digits as its factorization.

105153987 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 35051332.

The product of its (nonzero) digits is 37800, while the sum is 39.

The square root of 105153987 is about 10254.4618093784. The cubic root of 105153987 is about 471.9999087307. Note that the first 4 decimals are identical.

The spelling of 105153987 in words is "one hundred five million, one hundred fifty-three thousand, nine hundred eighty-seven".