144626693 has 2 divisors, whose sum is σ = 144626694. Its totient is φ = 144626692.

The previous prime is 144626681. The next prime is 144626707. The reversal of 144626693 is 396626441.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 113912929 + 30713764 = 10673^2 + 5542^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-144626693 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 144626693.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (144626663) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 72313346 + 72313347.

It is an arithmetic number, because the mean of its divisors is an integer number (72313347).

Almost surely, 2^144626693 is an apocalyptic number.

It is an amenable number.

144626693 is a deficient number, since it is larger than the sum of its proper divisors (1).

144626693 is an equidigital number, since it uses as much as digits as its factorization.

144626693 is an evil number, because the sum of its binary digits is even.

The product of its digits is 186624, while the sum is 41.

The square root of 144626693 is about 12026.0838596777. The cubic root of 144626693 is about 524.9075489511.

The spelling of 144626693 in words is "one hundred forty-four million, six hundred twenty-six thousand, six hundred ninety-three".