144994477 has 2 divisors, whose sum is σ = 144994478. Its totient is φ = 144994476.

The previous prime is 144994459. The next prime is 144994501. The reversal of 144994477 is 774499441.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 74753316 + 70241161 = 8646^2 + 8381^2 .

It is a cyclic number.

It is not a de Polignac number, because 144994477 - 2¹⁹ = 144470189 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 144994477.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (144994427) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 72497238 + 72497239.

It is an arithmetic number, because the mean of its divisors is an integer number (72497239).

Almost surely, 2^144994477 is an apocalyptic number.

It is an amenable number.

144994477 is a deficient number, since it is larger than the sum of its proper divisors (1).

144994477 is an equidigital number, since it uses as much as digits as its factorization.

144994477 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1016064, while the sum is 49.

The square root of 144994477 is about 12041.3652465159. The cubic root of 144994477 is about 525.3521169196.

The spelling of 144994477 in words is "one hundred forty-four million, nine hundred ninety-four thousand, four hundred seventy-seven".