144921693 has 8 divisors (see below), whose sum is σ = 220833088. Its totient is φ = 82812384.

The previous prime is 144921677. The next prime is 144921697. The reversal of 144921693 is 396129441.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 144921693 - 2⁴ = 144921677 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (144921697) 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 7 ways as a sum of consecutive naturals, for example, 3450496 + ... + 3450537.

It is an arithmetic number, because the mean of its divisors is an integer number (27604136).

Almost surely, 2^144921693 is an apocalyptic number.

It is an amenable number.

144921693 is a deficient number, since it is larger than the sum of its proper divisors (75911395).

144921693 is an equidigital number, since it uses as much as digits as its factorization.

144921693 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6901043.

The product of its digits is 46656, while the sum is 39.

The square root of 144921693 is about 12038.3426184837. The cubic root of 144921693 is about 525.2641971838.

The spelling of 144921693 in words is "one hundred forty-four million, nine hundred twenty-one thousand, six hundred ninety-three".