144622691 has 4 divisors (see below), whose sum is σ = 145079232. Its totient is φ = 144166152.

The previous prime is 144622663. The next prime is 144622697. The reversal of 144622691 is 196226441.

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

It is a cyclic number.

It is not a de Polignac number, because 144622691 - 2⁶ = 144622627 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (144622697) 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, 227795 + ... + 228428.

It is an arithmetic number, because the mean of its divisors is an integer number (36269808).

Almost surely, 2^144622691 is an apocalyptic number.

144622691 is a deficient number, since it is larger than the sum of its proper divisors (456541).

144622691 is an equidigital number, since it uses as much as digits as its factorization.

144622691 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 456540.

The product of its digits is 20736, while the sum is 35.

The square root of 144622691 is about 12025.9174701974. The cubic root of 144622691 is about 524.9027072921.

The spelling of 144622691 in words is "one hundred forty-four million, six hundred twenty-two thousand, six hundred ninety-one".