1063994721 has 8 divisors (see below), whose sum is σ = 1419401280. Its totient is φ = 708958992.

The previous prime is 1063994713. The next prime is 1063994761. The reversal of 1063994721 is 1274993601.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1063994721 - 2³ = 1063994713 is a prime.

It is a super-2 number, since 2×1063994721² = 2264169532631735682, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1063994761) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 85941 + ... + 97538.

It is an arithmetic number, because the mean of its divisors is an integer number (177425160).

Almost surely, 2^1063994721 is an apocalyptic number.

It is an amenable number.

1063994721 is a deficient number, since it is larger than the sum of its proper divisors (355406559).

1063994721 is a wasteful number, since it uses less digits than its factorization.

1063994721 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 185415.

The product of its (nonzero) digits is 81648, while the sum is 42.

The square root of 1063994721 is about 32618.9319414355. The cubic root of 1063994721 is about 1020.8920560209.

The spelling of 1063994721 in words is "one billion, sixty-three million, nine hundred ninety-four thousand, seven hundred twenty-one".