163540729 has 8 divisors (see below), whose sum is σ = 178500960. Its totient is φ = 148596000.

The previous prime is 163540723. The next prime is 163540747. The reversal of 163540729 is 927045361.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 163540729 - 2¹⁵ = 163507961 is a prime.

It is not an unprimeable number, because it can be changed into a prime (163540723) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 36829 + ... + 41029.

It is an arithmetic number, because the mean of its divisors is an integer number (22312620).

Almost surely, 2^163540729 is an apocalyptic number.

It is an amenable number.

163540729 is a deficient number, since it is larger than the sum of its proper divisors (14960231).

163540729 is a wasteful number, since it uses less digits than its factorization.

163540729 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7751.

The product of its (nonzero) digits is 45360, while the sum is 37.

The square root of 163540729 is about 12788.3043833027. The cubic root of 163540729 is about 546.8589317684.

The spelling of 163540729 in words is "one hundred sixty-three million, five hundred forty thousand, seven hundred twenty-nine".