162742009 has 4 divisors (see below), whose sum is σ = 162953316. Its totient is φ = 162530704.

The previous prime is 162741977. The next prime is 162742051. The reversal of 162742009 is 900247261.

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

It can be written as a sum of positive squares in 2 ways, for example, as 8982009 + 153760000 = 2997^2 + 12400^2 .

It is a cyclic number.

It is not a de Polignac number, because 162742009 - 2⁵ = 162741977 is a prime.

It is a super-2 number, since 2×162742009² = 52969922986712162, which contains 22 as substring.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (162742609) 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, 104494 + ... + 106039.

It is an arithmetic number, because the mean of its divisors is an integer number (40738329).

Almost surely, 2^162742009 is an apocalyptic number.

It is an amenable number.

162742009 is a deficient number, since it is larger than the sum of its proper divisors (211307).

162742009 is an equidigital number, since it uses as much as digits as its factorization.

162742009 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 211306.

The product of its (nonzero) digits is 6048, while the sum is 31.

The square root of 162742009 is about 12757.0376263457. The cubic root of 162742009 is about 545.9672065443.

The spelling of 162742009 in words is "one hundred sixty-two million, seven hundred forty-two thousand, nine".