1329981029 has 16 divisors (see below), whose sum is σ = 1450116864. Its totient is φ = 1212456000.

The previous prime is 1329980989. The next prime is 1329981031. The reversal of 1329981029 is 9201899231.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 1329981029 - 2¹² = 1329976933 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1329981229) 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 15 ways as a sum of consecutive naturals, for example, 643652 + ... + 645714.

It is an arithmetic number, because the mean of its divisors is an integer number (90632304).

Almost surely, 2^1329981029 is an apocalyptic number.

It is an amenable number.

1329981029 is a deficient number, since it is larger than the sum of its proper divisors (120135835).

1329981029 is a wasteful number, since it uses less digits than its factorization.

1329981029 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2668.

The product of its (nonzero) digits is 69984, while the sum is 44.

The square root of 1329981029 is about 36468.9049602535. The cubic root of 1329981029 is about 1099.7192200713.

The spelling of 1329981029 in words is "one billion, three hundred twenty-nine million, nine hundred eighty-one thousand, twenty-nine".