1624144421 has 2 divisors, whose sum is σ = 1624144422. Its totient is φ = 1624144420.

The previous prime is 1624144399. The next prime is 1624144451. The reversal of 1624144421 is 1244414261.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1623203521 + 940900 = 40289^2 + 970^2 .

It is a cyclic number.

It is not a de Polignac number, because 1624144421 - 2³⁰ = 550402597 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1624144451) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 812072210 + 812072211.

It is an arithmetic number, because the mean of its divisors is an integer number (812072211).

Almost surely, 2^1624144421 is an apocalyptic number.

It is an amenable number.

1624144421 is a deficient number, since it is larger than the sum of its proper divisors (1).

1624144421 is an equidigital number, since it uses as much as digits as its factorization.

1624144421 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 6144, while the sum is 29.

The square root of 1624144421 is about 40300.6751928550. The cubic root of 1624144421 is about 1175.4609740395.

Adding to 1624144421 its reverse (1244414261), we get a palindrome (2868558682).

The spelling of 1624144421 in words is "one billion, six hundred twenty-four million, one hundred forty-four thousand, four hundred twenty-one".