146921633 has 4 divisors (see below), whose sum is σ = 155564100. Its totient is φ = 138279168.

The previous prime is 146921629. The next prime is 146921639. The reversal of 146921633 is 336129641.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 133911184 + 13010449 = 11572^2 + 3607^2 .

It is a cyclic number.

It is not a de Polignac number, because 146921633 - 2² = 146921629 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 146921593 and 146921602.

It is not an unprimeable number, because it can be changed into a prime (146921639) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4321208 + ... + 4321241.

It is an arithmetic number, because the mean of its divisors is an integer number (38891025).

Almost surely, 2^146921633 is an apocalyptic number.

It is an amenable number.

146921633 is a deficient number, since it is larger than the sum of its proper divisors (8642467).

146921633 is an equidigital number, since it uses as much as digits as its factorization.

146921633 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8642466.

The product of its digits is 23328, while the sum is 35.

The square root of 146921633 is about 12121.1234215315. The cubic root of 146921633 is about 527.6694070416.

The spelling of 146921633 in words is "one hundred forty-six million, nine hundred twenty-one thousand, six hundred thirty-three".