1380052729 has 4 divisors (see below), whose sum is σ = 1505512080. Its totient is φ = 1254593380.

The previous prime is 1380052717. The next prime is 1380052733. The reversal of 1380052729 is 9272500831.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 1380052729 - 2⁵ = 1380052697 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1380052769) 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 3 ways as a sum of consecutive naturals, for example, 62729659 + ... + 62729680.

It is an arithmetic number, because the mean of its divisors is an integer number (376378020).

Almost surely, 2^1380052729 is an apocalyptic number.

It is an amenable number.

1380052729 is a deficient number, since it is larger than the sum of its proper divisors (125459351).

1380052729 is a wasteful number, since it uses less digits than its factorization.

1380052729 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 125459350.

The product of its (nonzero) digits is 30240, while the sum is 37.

The square root of 1380052729 is about 37149.0609437170. The cubic root of 1380052729 is about 1113.3504613183.

The spelling of 1380052729 in words is "one billion, three hundred eighty million, fifty-two thousand, seven hundred twenty-nine".