146523809 has 4 divisors (see below), whose sum is σ = 146548416. Its totient is φ = 146499204.

The previous prime is 146523803. The next prime is 146523821. The reversal of 146523809 is 908325641.

It is a happy number.

146523809 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 a Blum integer, because the two primes are equal to 3 mod 4, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 908325641 = 73 ⋅12442817.

It is a cyclic number.

It is not a de Polignac number, because 146523809 - 2²⁴ = 129746593 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (146523803) 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, 2852 + ... + 17354.

It is an arithmetic number, because the mean of its divisors is an integer number (36637104).

Almost surely, 2^146523809 is an apocalyptic number.

It is an amenable number.

146523809 is a deficient number, since it is larger than the sum of its proper divisors (24607).

146523809 is a wasteful number, since it uses less digits than its factorization.

146523809 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24606.

The product of its (nonzero) digits is 51840, while the sum is 38.

The square root of 146523809 is about 12104.7019376769. The cubic root of 146523809 is about 527.1927145722.

The spelling of 146523809 in words is "one hundred forty-six million, five hundred twenty-three thousand, eight hundred nine".