1063729981 has 8 divisors (see below), whose sum is σ = 1086338304. Its totient is φ = 1041215760.

The previous prime is 1063729937. The next prime is 1063729987. The reversal of 1063729981 is 1899273601.

It is a happy number.

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 1063729981 - 2⁷ = 1063729853 is a prime.

It is a super-2 number, since 2×1063729981² = 2263042944956520722, 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 (1063729987) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 441 + ... + 46126.

It is an arithmetic number, because the mean of its divisors is an integer number (135792288).

Almost surely, 2^1063729981 is an apocalyptic number.

It is an amenable number.

1063729981 is a deficient number, since it is larger than the sum of its proper divisors (22608323).

1063729981 is an equidigital number, since it uses as much as digits as its factorization.

1063729981 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 47051.

The product of its (nonzero) digits is 163296, while the sum is 46.

The square root of 1063729981 is about 32614.8736161893. The cubic root of 1063729981 is about 1020.8073772230.

The spelling of 1063729981 in words is "one billion, sixty-three million, seven hundred twenty-nine thousand, nine hundred eighty-one".