144636853 has 4 divisors (see below), whose sum is σ = 146795680. Its totient is φ = 142478028.

The previous prime is 144636829. The next prime is 144636883. The reversal of 144636853 is 358636441.

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 an emirpimes, since its reverse is a distinct semiprime: 358636441 = 743 ⋅482687.

It is a cyclic number.

It is not a de Polignac number, because 144636853 - 2¹³ = 144628661 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (144636883) 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, 1079313 + ... + 1079446.

It is an arithmetic number, because the mean of its divisors is an integer number (36698920).

Almost surely, 2^144636853 is an apocalyptic number.

It is an amenable number.

144636853 is a deficient number, since it is larger than the sum of its proper divisors (2158827).

144636853 is an equidigital number, since it uses as much as digits as its factorization.

144636853 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2158826.

The product of its digits is 207360, while the sum is 40.

The square root of 144636853 is about 12026.5062674078. The cubic root of 144636853 is about 524.9198402179.

It can be divided in two parts, 14463 and 6853, that added together give a square (21316 = 146²).

The spelling of 144636853 in words is "one hundred forty-four million, six hundred thirty-six thousand, eight hundred fifty-three".