144017681 has 2 divisors, whose sum is σ = 144017682. Its totient is φ = 144017680.

The previous prime is 144017677. The next prime is 144017791. The reversal of 144017681 is 186710441.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 143017681 + 1000000 = 11959^2 + 1000^2 .

It is a cyclic number.

It is not a de Polignac number, because 144017681 - 2² = 144017677 is a prime.

It is a super-2 number, since 2×144017681² = 41482184881235522, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (144017611) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 72008840 + 72008841.

It is an arithmetic number, because the mean of its divisors is an integer number (72008841).

Almost surely, 2^144017681 is an apocalyptic number.

It is an amenable number.

144017681 is a deficient number, since it is larger than the sum of its proper divisors (1).

144017681 is an equidigital number, since it uses as much as digits as its factorization.

144017681 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5376, while the sum is 32.

The square root of 144017681 is about 12000.7366857206. The cubic root of 144017681 is about 524.1697304308.

The spelling of 144017681 in words is "one hundred forty-four million, seventeen thousand, six hundred eighty-one".