144391517 has 2 divisors, whose sum is σ = 144391518. Its totient is φ = 144391516.

The previous prime is 144391441. The next prime is 144391547. The reversal of 144391517 is 715193441.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 133494916 + 10896601 = 11554^2 + 3301^2 .

It is a cyclic number.

It is not a de Polignac number, because 144391517 - 2¹⁶ = 144325981 is a prime.

It is a super-2 number, since 2×144391517² = 41697820363122578, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (144391547) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 72195758 + 72195759.

It is an arithmetic number, because the mean of its divisors is an integer number (72195759).

Almost surely, 2^144391517 is an apocalyptic number.

It is an amenable number.

144391517 is a deficient number, since it is larger than the sum of its proper divisors (1).

144391517 is an equidigital number, since it uses as much as digits as its factorization.

144391517 is an evil number, because the sum of its binary digits is even.

The product of its digits is 15120, while the sum is 35.

The square root of 144391517 is about 12016.3021350164. The cubic root of 144391517 is about 524.6228789802.

The spelling of 144391517 in words is "one hundred forty-four million, three hundred ninety-one thousand, five hundred seventeen".