144661637 has 2 divisors, whose sum is σ = 144661638. Its totient is φ = 144661636.

The previous prime is 144661607. The next prime is 144661669. The reversal of 144661637 is 736166441.

144661637 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 137686756 + 6974881 = 11734^2 + 2641^2 .

It is a cyclic number.

It is not a de Polignac number, because 144661637 - 2²⁰ = 143613061 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 144661637.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (144661607) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 72330818 + 72330819.

It is an arithmetic number, because the mean of its divisors is an integer number (72330819).

Almost surely, 2^144661637 is an apocalyptic number.

It is an amenable number.

144661637 is a deficient number, since it is larger than the sum of its proper divisors (1).

144661637 is an equidigital number, since it uses as much as digits as its factorization.

144661637 is an evil number, because the sum of its binary digits is even.

The product of its digits is 72576, while the sum is 38.

The square root of 144661637 is about 12027.5366139538. The cubic root of 144661637 is about 524.9498207520.

The spelling of 144661637 in words is "one hundred forty-four million, six hundred sixty-one thousand, six hundred thirty-seven".