162748921 has 4 divisors (see below), whose sum is σ = 166211712. Its totient is φ = 159286132.

The previous prime is 162748919. The next prime is 162748931. The reversal of 162748921 is 129847261.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 129847261 = 5393 ⋅24077.

It is a cyclic number.

It is not a de Polignac number, because 162748921 - 2¹ = 162748919 is a prime.

It is a super-2 number, since 2×162748921² = 52974422573328482, which contains 22 as substring.

It is a Smith number, since the sum of its digits (40) 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 (162748931) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1731325 + ... + 1731418.

It is an arithmetic number, because the mean of its divisors is an integer number (41552928).

Almost surely, 2^162748921 is an apocalyptic number.

It is an amenable number.

162748921 is a deficient number, since it is larger than the sum of its proper divisors (3462791).

162748921 is an equidigital number, since it uses as much as digits as its factorization.

162748921 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3462790.

The product of its digits is 48384, while the sum is 40.

The square root of 162748921 is about 12757.3085327588. The cubic root of 162748921 is about 545.9749358986.

The spelling of 162748921 in words is "one hundred sixty-two million, seven hundred forty-eight thousand, nine hundred twenty-one".