153798949 has 4 divisors (see below), whose sum is σ = 162845964. Its totient is φ = 144751936.

The previous prime is 153798947. The next prime is 153798959. The reversal of 153798949 is 949897351.

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 78889924 + 74909025 = 8882^2 + 8655^2 .

It is a cyclic number.

It is not a de Polignac number, because 153798949 - 2¹ = 153798947 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 153798949.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (153798943) 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, 4523482 + ... + 4523515.

It is an arithmetic number, because the mean of its divisors is an integer number (40711491).

Almost surely, 2^153798949 is an apocalyptic number.

It is an amenable number.

153798949 is a deficient number, since it is larger than the sum of its proper divisors (9047015).

153798949 is an equidigital number, since it uses as much as digits as its factorization.

153798949 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9047014.

The product of its digits is 2449440, while the sum is 55.

The square root of 153798949 is about 12401.5704247486. The cubic root of 153798949 is about 535.7774808226. Note that the first 3 decimals are identical.

The spelling of 153798949 in words is "one hundred fifty-three million, seven hundred ninety-eight thousand, nine hundred forty-nine".