144151993 has 24 divisors (see below), whose sum is σ = 163604448. Its totient is φ = 126534528.

The previous prime is 144151979. The next prime is 144152009. The reversal of 144151993 is 399151441.

It is not a de Polignac number, because 144151993 - 2⁹ = 144151481 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (144151913) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 509230 + ... + 509512.

It is an arithmetic number, because the mean of its divisors is an integer number (6816852).

Almost surely, 2^144151993 is an apocalyptic number.

It is an amenable number.

144151993 is a deficient number, since it is larger than the sum of its proper divisors (19452455).

144151993 is a wasteful number, since it uses less digits than its factorization.

144151993 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 421 (or 402 counting only the distinct ones).

The product of its digits is 19440, while the sum is 37.

The square root of 144151993 is about 12006.3313714057. The cubic root of 144151993 is about 524.3326280458.

The spelling of 144151993 in words is "one hundred forty-four million, one hundred fifty-one thousand, nine hundred ninety-three".