144433391 has 2 divisors, whose sum is σ = 144433392. Its totient is φ = 144433390.

The previous prime is 144433381. The next prime is 144433451. The reversal of 144433391 is 193334441.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-144433391 is a prime.

It is a super-2 number, since 2×144433391² = 41722008871517762, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (144433381) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 72216695 + 72216696.

It is an arithmetic number, because the mean of its divisors is an integer number (72216696).

Almost surely, 2^144433391 is an apocalyptic number.

144433391 is a deficient number, since it is larger than the sum of its proper divisors (1).

144433391 is an equidigital number, since it uses as much as digits as its factorization.

144433391 is an evil number, because the sum of its binary digits is even.

The product of its digits is 15552, while the sum is 32.

The square root of 144433391 is about 12018.0443916637. The cubic root of 144433391 is about 524.6735881807.

The spelling of 144433391 in words is "one hundred forty-four million, four hundred thirty-three thousand, three hundred ninety-one".