146721473 has 4 divisors (see below), whose sum is σ = 147569748. Its totient is φ = 145873200.

The previous prime is 146721433. The next prime is 146721479. The reversal of 146721473 is 374127641.

146721473 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 374127641 = 9059 ⋅41299.

It can be written as a sum of positive squares in 2 ways, for example, as 99840064 + 46881409 = 9992^2 + 6847^2 .

It is a cyclic number.

It is not a de Polignac number, because 146721473 - 2¹² = 146717377 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (146721479) 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, 423878 + ... + 424223.

It is an arithmetic number, because the mean of its divisors is an integer number (36892437).

Almost surely, 2^146721473 is an apocalyptic number.

It is an amenable number.

146721473 is a deficient number, since it is larger than the sum of its proper divisors (848275).

146721473 is an equidigital number, since it uses as much as digits as its factorization.

146721473 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 848274.

The product of its digits is 28224, while the sum is 35.

The square root of 146721473 is about 12112.8639470606. The cubic root of 146721473 is about 527.4296730963.

The spelling of 146721473 in words is "one hundred forty-six million, seven hundred twenty-one thousand, four hundred seventy-three".