162728999 has 4 divisors (see below), whose sum is σ = 162828864. Its totient is φ = 162629136.

The previous prime is 162728989. The next prime is 162729023. The reversal of 162728999 is 999827261.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 162728999 - 2⁴ = 162728983 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 162728999.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (162728989) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 47447 + ... + 50760.

It is an arithmetic number, because the mean of its divisors is an integer number (40707216).

Almost surely, 2^162728999 is an apocalyptic number.

162728999 is a deficient number, since it is larger than the sum of its proper divisors (99865).

162728999 is an equidigital number, since it uses as much as digits as its factorization.

162728999 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 99864.

The product of its digits is 979776, while the sum is 53.

The square root of 162728999 is about 12756.5277015338. The cubic root of 162728999 is about 545.9526574989.

The spelling of 162728999 in words is "one hundred sixty-two million, seven hundred twenty-eight thousand, nine hundred ninety-nine".