1443429681 has 16 divisors (see below), whose sum is σ = 1978722624. Its totient is φ = 935267904.

The previous prime is 1443429649. The next prime is 1443429697. The reversal of 1443429681 is 1869243441.

It is not a de Polignac number, because 1443429681 - 2⁵ = 1443429649 is a prime.

It is a super-2 number, since 2×1443429681² = 4166978487983523522, which contains 22 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (1443429181) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 104146 + ... + 117188.

It is an arithmetic number, because the mean of its divisors is an integer number (123670164).

Almost surely, 2^1443429681 is an apocalyptic number.

It is an amenable number.

1443429681 is a deficient number, since it is larger than the sum of its proper divisors (535292943).

1443429681 is a wasteful number, since it uses less digits than its factorization.

1443429681 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14080.

The product of its digits is 165888, while the sum is 42.

The square root of 1443429681 is about 37992.4950615250. The cubic root of 1443429681 is about 1130.1390386777.

The spelling of 1443429681 in words is "one billion, four hundred forty-three million, four hundred twenty-nine thousand, six hundred eighty-one".