144181693 has 2 divisors, whose sum is σ = 144181694. Its totient is φ = 144181692.

The previous prime is 144181627. The next prime is 144181727. The reversal of 144181693 is 396181441.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 72897444 + 71284249 = 8538^2 + 8443^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-144181693 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (144181493) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 72090846 + 72090847.

It is an arithmetic number, because the mean of its divisors is an integer number (72090847).

Almost surely, 2^144181693 is an apocalyptic number.

It is an amenable number.

144181693 is a deficient number, since it is larger than the sum of its proper divisors (1).

144181693 is an equidigital number, since it uses as much as digits as its factorization.

144181693 is an evil number, because the sum of its binary digits is even.

The product of its digits is 20736, while the sum is 37.

The square root of 144181693 is about 12007.5681551262. The cubic root of 144181693 is about 524.3686354325.

The spelling of 144181693 in words is "one hundred forty-four million, one hundred eighty-one thousand, six hundred ninety-three".