144623381 has 4 divisors (see below), whose sum is σ = 165283872. Its totient is φ = 123962892.

The previous prime is 144623363. The next prime is 144623387. The reversal of 144623381 is 183326441.

144623381 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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.

It is a cyclic number.

It is not a de Polignac number, because 144623381 - 2⁶ = 144623317 is a prime.

It is a super-2 number, since 2×144623381² = 41831844663742322, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (144623387) 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, 10330235 + ... + 10330248.

It is an arithmetic number, because the mean of its divisors is an integer number (41320968).

Almost surely, 2^144623381 is an apocalyptic number.

It is an amenable number.

144623381 is a deficient number, since it is larger than the sum of its proper divisors (20660491).

144623381 is an equidigital number, since it uses as much as digits as its factorization.

144623381 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20660490.

The product of its digits is 13824, while the sum is 32.

The square root of 144623381 is about 12025.9461582031. The cubic root of 144623381 is about 524.9035420673.

The spelling of 144623381 in words is "one hundred forty-four million, six hundred twenty-three thousand, three hundred eighty-one".