1329730901 has 24 divisors (see below), whose sum is σ = 1463330904. Its totient is φ = 1206627840.

The previous prime is 1329730873. The next prime is 1329730931. The reversal of 1329730901 is 1090379231.

It can be written as a sum of positive squares in 4 ways, for example, as 78411025 + 1251319876 = 8855^2 + 35374^2 .

It is a de Polignac number, because none of the positive numbers 2^k-1329730901 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1329730931) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 801665 + ... + 803321.

It is an arithmetic number, because the mean of its divisors is an integer number (60972121).

Almost surely, 2^1329730901 is an apocalyptic number.

It is an amenable number.

1329730901 is a deficient number, since it is larger than the sum of its proper divisors (133600003).

1329730901 is a wasteful number, since it uses less digits than its factorization.

1329730901 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1781 (or 1758 counting only the distinct ones).

The product of its (nonzero) digits is 10206, while the sum is 35.

The square root of 1329730901 is about 36465.4754665286. The cubic root of 1329730901 is about 1099.6502747733.

The spelling of 1329730901 in words is "one billion, three hundred twenty-nine million, seven hundred thirty thousand, nine hundred one".