153990241 has 4 divisors (see below), whose sum is σ = 154880532. Its totient is φ = 153099952.

The previous prime is 153990229. The next prime is 153990251. The reversal of 153990241 is 142099351.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 142099351 = 37 ⋅3840523.

It can be written as a sum of positive squares in 2 ways, for example, as 106090000 + 47900241 = 10300^2 + 6921^2 .

It is a cyclic number.

It is not a de Polignac number, because 153990241 - 2⁵ = 153990209 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 153990197 and 153990206.

It is not an unprimeable number, because it can be changed into a prime (153990251) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 444886 + ... + 445231.

It is an arithmetic number, because the mean of its divisors is an integer number (38720133).

Almost surely, 2^153990241 is an apocalyptic number.

It is an amenable number.

153990241 is a deficient number, since it is larger than the sum of its proper divisors (890291).

153990241 is an equidigital number, since it uses as much as digits as its factorization.

153990241 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 890290.

The product of its (nonzero) digits is 9720, while the sum is 34.

The square root of 153990241 is about 12409.2804384461. The cubic root of 153990241 is about 535.9995184985. Note that the first 3 decimals are identical.

The spelling of 153990241 in words is "one hundred fifty-three million, nine hundred ninety thousand, two hundred forty-one".