144391867 has 2 divisors, whose sum is σ = 144391868. Its totient is φ = 144391866.

The previous prime is 144391859. The next prime is 144391879. The reversal of 144391867 is 768193441.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 144391867 - 2³ = 144391859 is a prime.

It is a super-2 number, since 2×144391867² = 41698022511491378, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (144391847) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 72195933 + 72195934.

It is an arithmetic number, because the mean of its divisors is an integer number (72195934).

Almost surely, 2^144391867 is an apocalyptic number.

144391867 is a deficient number, since it is larger than the sum of its proper divisors (1).

144391867 is an equidigital number, since it uses as much as digits as its factorization.

144391867 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 145152, while the sum is 43.

The square root of 144391867 is about 12016.3166985562. The cubic root of 144391867 is about 524.6233028690.

The spelling of 144391867 in words is "one hundred forty-four million, three hundred ninety-one thousand, eight hundred sixty-seven".