144847669 has 2 divisors, whose sum is σ = 144847670. Its totient is φ = 144847668.

The previous prime is 144847631. The next prime is 144847687. The reversal of 144847669 is 966748441.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 97416900 + 47430769 = 9870^2 + 6887^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-144847669 is a prime.

It is a super-2 number, since 2×144847669² = 41961694429467122, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (144844669) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 72423834 + 72423835.

It is an arithmetic number, because the mean of its divisors is an integer number (72423835).

Almost surely, 2^144847669 is an apocalyptic number.

It is an amenable number.

144847669 is a deficient number, since it is larger than the sum of its proper divisors (1).

144847669 is an equidigital number, since it uses as much as digits as its factorization.

144847669 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1161216, while the sum is 49.

The square root of 144847669 is about 12035.2677161748. The cubic root of 144847669 is about 525.1747493857.

The spelling of 144847669 in words is "one hundred forty-four million, eight hundred forty-seven thousand, six hundred sixty-nine".