168223953 has 4 divisors (see below), whose sum is σ = 224298608. Its totient is φ = 112149300.

The previous prime is 168223931. The next prime is 168223963. The reversal of 168223953 is 359322861.

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.

It is not a de Polignac number, because 168223953 - 2²¹ = 166126801 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (168223963) 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, 28037323 + ... + 28037328.

It is an arithmetic number, because the mean of its divisors is an integer number (56074652).

Almost surely, 2^168223953 is an apocalyptic number.

It is an amenable number.

168223953 is a deficient number, since it is larger than the sum of its proper divisors (56074655).

168223953 is an equidigital number, since it uses as much as digits as its factorization.

168223953 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 56074654.

The product of its digits is 77760, while the sum is 39.

The square root of 168223953 is about 12970.1176941460. The cubic root of 168223953 is about 552.0299126565.

The spelling of 168223953 in words is "one hundred sixty-eight million, two hundred twenty-three thousand, nine hundred fifty-three".