10409987 has 8 divisors (see below), whose sum is σ = 12218976. Its totient is φ = 8681472.

The previous prime is 10409981. The next prime is 10409989. The reversal of 10409987 is 78990401.

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 10409987 - 2¹² = 10405891 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 10409987.

It is not an unprimeable number, because it can be changed into a prime (10409981) 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 7 ways as a sum of consecutive naturals, for example, 19838 + ... + 20355.

It is an arithmetic number, because the mean of its divisors is an integer number (1527372).

Almost surely, 2^10409987 is an apocalyptic number.

10409987 is a deficient number, since it is larger than the sum of its proper divisors (1808989).

10409987 is an equidigital number, since it uses as much as digits as its factorization.

10409987 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40237.

The product of its (nonzero) digits is 18144, while the sum is 38.

The square root of 10409987 is about 3226.4511463836. The cubic root of 10409987 is about 218.3484243918.

The spelling of 10409987 in words is "ten million, four hundred nine thousand, nine hundred eighty-seven".