144691699 has 4 divisors (see below), whose sum is σ = 146183464. Its totient is φ = 143199936.

The previous prime is 144691697. The next prime is 144691721. The reversal of 144691699 is 996196441.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 144691699 - 2¹ = 144691697 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (144691697) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 745737 + ... + 745930.

It is an arithmetic number, because the mean of its divisors is an integer number (36545866).

Almost surely, 2^144691699 is an apocalyptic number.

144691699 is a deficient number, since it is larger than the sum of its proper divisors (1491765).

144691699 is an equidigital number, since it uses as much as digits as its factorization.

144691699 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1491764.

The product of its digits is 419904, while the sum is 49.

The square root of 144691699 is about 12028.7862646237. The cubic root of 144691699 is about 524.9861813445.

The spelling of 144691699 in words is "one hundred forty-four million, six hundred ninety-one thousand, six hundred ninety-nine".