981814669 has 4 divisors (see below), whose sum is σ = 1071070560. Its totient is φ = 892558780.

The previous prime is 981814667. The next prime is 981814679. The reversal of 981814669 is 966418189.

981814669 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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, and also an emirpimes, since its reverse is a distinct semiprime: 966418189 = 11 ⋅87856199.

It is a cyclic number.

It is not a de Polignac number, because 981814669 - 2¹ = 981814667 is a prime.

It is a super-2 number, since 2×981814669² = 1927920088527159122, 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 (981814661) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 44627929 + ... + 44627950.

It is an arithmetic number, because the mean of its divisors is an integer number (267767640).

Almost surely, 2^981814669 is an apocalyptic number.

It is an amenable number.

981814669 is a deficient number, since it is larger than the sum of its proper divisors (89255891).

981814669 is a wasteful number, since it uses less digits than its factorization.

981814669 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 89255890.

The product of its digits is 746496, while the sum is 52.

The square root of 981814669 is about 31333.9220175196. The cubic root of 981814669 is about 993.9011020633.

The spelling of 981814669 in words is "nine hundred eighty-one million, eight hundred fourteen thousand, six hundred sixty-nine".