144775799 has 4 divisors (see below), whose sum is σ = 165458064. Its totient is φ = 124093536.

The previous prime is 144775781. The next prime is 144775817. The reversal of 144775799 is 997577441.

It is a happy number.

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

It is an interprime number because it is at equal distance from previous prime (144775781) and next prime (144775817).

It is a de Polignac number, because none of the positive numbers 2^k-144775799 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 144775799.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (144775199) 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 3 ways as a sum of consecutive naturals, for example, 10341122 + ... + 10341135.

It is an arithmetic number, because the mean of its divisors is an integer number (41364516).

Almost surely, 2^144775799 is an apocalyptic number.

144775799 is a deficient number, since it is larger than the sum of its proper divisors (20682265).

144775799 is an equidigital number, since it uses as much as digits as its factorization.

144775799 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20682264.

The product of its digits is 2222640, while the sum is 53.

The square root of 144775799 is about 12032.2815375971. The cubic root of 144775799 is about 525.0878752376.

The spelling of 144775799 in words is "one hundred forty-four million, seven hundred seventy-five thousand, seven hundred ninety-nine".