162639643 has 4 divisors (see below), whose sum is σ = 162925048. Its totient is φ = 162354240.

The previous prime is 162639641. The next prime is 162639667. The reversal of 162639643 is 346936261.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 346936261 = 7 ⋅49562323.

It is a cyclic number.

It is not a de Polignac number, because 162639643 - 2¹ = 162639641 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 162639596 and 162639605.

It is not an unprimeable number, because it can be changed into a prime (162639641) 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, 141846 + ... + 142987.

It is an arithmetic number, because the mean of its divisors is an integer number (40731262).

Almost surely, 2^162639643 is an apocalyptic number.

162639643 is a deficient number, since it is larger than the sum of its proper divisors (285405).

162639643 is an equidigital number, since it uses as much as digits as its factorization.

162639643 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 285404.

The product of its digits is 139968, while the sum is 40.

The square root of 162639643 is about 12753.0248568722. The cubic root of 162639643 is about 545.8527099830.

The spelling of 162639643 in words is "one hundred sixty-two million, six hundred thirty-nine thousand, six hundred forty-three".