161052729 has 4 divisors (see below), whose sum is σ = 214736976. Its totient is φ = 107368484.

The previous prime is 161052707. The next prime is 161052737. The reversal of 161052729 is 927250161.

161052729 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 161052729 - 2⁸ = 161052473 is a prime.

It is an alternating number because its digits alternate between odd and even.

It is a self number, because there is not a number n which added to its sum of digits gives 161052729.

It is not an unprimeable number, because it can be changed into a prime (161052769) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 26842119 + ... + 26842124.

It is an arithmetic number, because the mean of its divisors is an integer number (53684244).

Almost surely, 2^161052729 is an apocalyptic number.

It is an amenable number.

161052729 is a deficient number, since it is larger than the sum of its proper divisors (53684247).

161052729 is an equidigital number, since it uses as much as digits as its factorization.

161052729 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 53684246.

The product of its (nonzero) digits is 7560, while the sum is 33.

The square root of 161052729 is about 12690.6551840321. The cubic root of 161052729 is about 544.0715657452.

The spelling of 161052729 in words is "one hundred sixty-one million, fifty-two thousand, seven hundred twenty-nine".