1384642549 has 2 divisors, whose sum is σ = 1384642550. Its totient is φ = 1384642548.

The previous prime is 1384642541. The next prime is 1384642577. The reversal of 1384642549 is 9452464831.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1226260324 + 158382225 = 35018^2 + 12585^2 .

It is a cyclic number.

It is not a de Polignac number, because 1384642549 - 2³ = 1384642541 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1384642499 and 1384642508.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1384642541) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 692321274 + 692321275.

It is an arithmetic number, because the mean of its divisors is an integer number (692321275).

Almost surely, 2^1384642549 is an apocalyptic number.

It is an amenable number.

1384642549 is a deficient number, since it is larger than the sum of its proper divisors (1).

1384642549 is an equidigital number, since it uses as much as digits as its factorization.

1384642549 is an evil number, because the sum of its binary digits is even.

The product of its digits is 829440, while the sum is 46.

The square root of 1384642549 is about 37210.7853854229. The cubic root of 1384642549 is about 1114.5833667642.

The spelling of 1384642549 in words is "one billion, three hundred eighty-four million, six hundred forty-two thousand, five hundred forty-nine".