162109493 has 12 divisors (see below), whose sum is σ = 203083020. Its totient is φ = 128261952.

The previous prime is 162109483. The next prime is 162109511. The reversal of 162109493 is 394901261.

It can be written as a sum of positive squares in 2 ways, for example, as 91431844 + 70677649 = 9562^2 + 8407^2 .

It is not a de Polignac number, because 162109493 - 2⁸ = 162109237 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (162109483) 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 11 ways as a sum of consecutive naturals, for example, 126608 + ... + 127881.

It is an arithmetic number, because the mean of its divisors is an integer number (16923585).

Almost surely, 2^162109493 is an apocalyptic number.

162109493 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

It is an amenable number.

162109493 is a deficient number, since it is larger than the sum of its proper divisors (40973527).

162109493 is a wasteful number, since it uses less digits than its factorization.

162109493 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 254516 (or 254509 counting only the distinct ones).

The product of its (nonzero) digits is 11664, while the sum is 35.

The square root of 162109493 is about 12732.2226260775. Note that the first 3 decimals coincide. The cubic root of 162109493 is about 545.2589662304.

The spelling of 162109493 in words is "one hundred sixty-two million, one hundred nine thousand, four hundred ninety-three".