144631621 has 2 divisors, whose sum is σ = 144631622. Its totient is φ = 144631620.

The previous prime is 144631601. The next prime is 144631639. The reversal of 144631621 is 126136441.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 108451396 + 36180225 = 10414^2 + 6015^2 .

It is a cyclic number.

It is not a de Polignac number, because 144631621 - 2⁵ = 144631589 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 144631621.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (144631601) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 72315810 + 72315811.

It is an arithmetic number, because the mean of its divisors is an integer number (72315811).

Almost surely, 2^144631621 is an apocalyptic number.

It is an amenable number.

144631621 is a deficient number, since it is larger than the sum of its proper divisors (1).

144631621 is an equidigital number, since it uses as much as digits as its factorization.

144631621 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3456, while the sum is 28.

The square root of 144631621 is about 12026.2887459099. The cubic root of 144631621 is about 524.9135107713.

The spelling of 144631621 in words is "one hundred forty-four million, six hundred thirty-one thousand, six hundred twenty-one".