105649487 has 4 divisors (see below), whose sum is σ = 105695616. Its totient is φ = 105603360.

The previous prime is 105649483. The next prime is 105649513. The reversal of 105649487 is 784946501.

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

It is a cyclic number.

It is not a de Polignac number, because 105649487 - 2² = 105649483 is a prime.

It is a super-2 number, since 2×105649487² = 22323628206726338, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (105649483) 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 3 ways as a sum of consecutive naturals, for example, 19439 + ... + 24272.

It is an arithmetic number, because the mean of its divisors is an integer number (26423904).

Almost surely, 2^105649487 is an apocalyptic number.

105649487 is a deficient number, since it is larger than the sum of its proper divisors (46129).

105649487 is an equidigital number, since it uses as much as digits as its factorization.

105649487 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 46128.

The product of its (nonzero) digits is 241920, while the sum is 44.

The square root of 105649487 is about 10278.5936294806. The cubic root of 105649487 is about 472.7401233697.

The spelling of 105649487 in words is "one hundred five million, six hundred forty-nine thousand, four hundred eighty-seven".