10635981 has 4 divisors (see below), whose sum is σ = 14181312. Its totient is φ = 7090652.

The previous prime is 10635979. The next prime is 10635997. The reversal of 10635981 is 18953601.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 10635981 - 2¹ = 10635979 is a prime.

It is a super-2 number, since 2×10635981² = 226248183664722, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10635901) 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, 1772661 + ... + 1772666.

It is an arithmetic number, because the mean of its divisors is an integer number (3545328).

Almost surely, 2^10635981 is an apocalyptic number.

It is an amenable number.

10635981 is a deficient number, since it is larger than the sum of its proper divisors (3545331).

10635981 is an equidigital number, since it uses as much as digits as its factorization.

10635981 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3545330.

The product of its (nonzero) digits is 6480, while the sum is 33.

The square root of 10635981 is about 3261.2851761231. The cubic root of 10635981 is about 219.9171933539.

The spelling of 10635981 in words is "ten million, six hundred thirty-five thousand, nine hundred eighty-one".