153990563 has 4 divisors (see below), whose sum is σ = 154034160. Its totient is φ = 153946968.

The previous prime is 153990541. The next prime is 153990581. The reversal of 153990563 is 365099351.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 365099351 = 53 ⋅6888667.

It is a cyclic number.

It is not a de Polignac number, because 153990563 - 2¹² = 153986467 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 153990563.

It is not an unprimeable number, because it can be changed into a prime (153990523) 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, 15983 + ... + 23736.

It is an arithmetic number, because the mean of its divisors is an integer number (38508540).

Almost surely, 2^153990563 is an apocalyptic number.

153990563 is a deficient number, since it is larger than the sum of its proper divisors (43597).

153990563 is an equidigital number, since it uses as much as digits as its factorization.

153990563 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 43596.

The product of its (nonzero) digits is 109350, while the sum is 41.

The square root of 153990563 is about 12409.2934126001. The cubic root of 153990563 is about 535.9998920973. Note that the first 3 decimals are identical.

The spelling of 153990563 in words is "one hundred fifty-three million, nine hundred ninety thousand, five hundred sixty-three".