162123503 has 4 divisors (see below), whose sum is σ = 162149400. Its totient is φ = 162097608.

The previous prime is 162123487. The next prime is 162123541. The reversal of 162123503 is 305321261.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 305321261 = 7 ⋅43617323.

It is a cyclic number.

It is not a de Polignac number, because 162123503 - 2⁴ = 162123487 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (162123103) 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, 2948 + ... + 18246.

It is an arithmetic number, because the mean of its divisors is an integer number (40537350).

Almost surely, 2^162123503 is an apocalyptic number.

162123503 is a deficient number, since it is larger than the sum of its proper divisors (25897).

162123503 is a wasteful number, since it uses less digits than its factorization.

162123503 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25896.

The product of its (nonzero) digits is 1080, while the sum is 23.

The square root of 162123503 is about 12732.7727930722. The cubic root of 162123503 is about 545.2746734292.

Adding to 162123503 its reverse (305321261), we get a palindrome (467444764).

The spelling of 162123503 in words is "one hundred sixty-two million, one hundred twenty-three thousand, five hundred three".