153840845 has 4 divisors (see below), whose sum is σ = 184609020. Its totient is φ = 123072672.

The previous prime is 153840829. The next prime is 153840847. The reversal of 153840845 is 548048351.

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 50737129 + 103103716 = 7123^2 + 10154^2 .

It is a cyclic number.

It is not a de Polignac number, because 153840845 - 2⁴ = 153840829 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 153840799 and 153840808.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (153840847) 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, 15384080 + ... + 15384089.

It is an arithmetic number, because the mean of its divisors is an integer number (46152255).

Almost surely, 2^153840845 is an apocalyptic number.

It is an amenable number.

153840845 is a deficient number, since it is larger than the sum of its proper divisors (30768175).

153840845 is an equidigital number, since it uses as much as digits as its factorization.

153840845 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30768174.

The product of its (nonzero) digits is 76800, while the sum is 38.

The square root of 153840845 is about 12403.2594506444. The cubic root of 153840845 is about 535.8261263553.

The spelling of 153840845 in words is "one hundred fifty-three million, eight hundred forty thousand, eight hundred forty-five".