105687491 has 8 divisors (see below), whose sum is σ = 130077024. Its totient is φ = 83620800.

The previous prime is 105687457. The next prime is 105687497. The reversal of 105687491 is 194786501.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 105687491 - 2⁶ = 105687427 is a prime.

It is a super-2 number, since 2×105687491² = 22339691507750162, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (105687497) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 580610 + ... + 580791.

It is an arithmetic number, because the mean of its divisors is an integer number (16259628).

Almost surely, 2^105687491 is an apocalyptic number.

105687491 is a deficient number, since it is larger than the sum of its proper divisors (24389533).

105687491 is a wasteful number, since it uses less digits than its factorization.

105687491 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1161421.

The product of its (nonzero) digits is 60480, while the sum is 41.

The square root of 105687491 is about 10280.4421597517. The cubic root of 105687491 is about 472.7968009185.

The spelling of 105687491 in words is "one hundred five million, six hundred eighty-seven thousand, four hundred ninety-one".