1438518541 has 2 divisors, whose sum is σ = 1438518542. Its totient is φ = 1438518540.

The previous prime is 1438518539. The next prime is 1438518553. The reversal of 1438518541 is 1458158341.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1432925316 + 5593225 = 37854^2 + 2365^2 .

It is an emirp because it is prime and its reverse (1458158341) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1438518541 - 2¹ = 1438518539 is a prime.

Together with 1438518539, it forms a pair of twin primes.

It is a junction number, because it is equal to n+sod(n) for n = 1438518494 and 1438518503.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1438518041) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 719259270 + 719259271.

It is an arithmetic number, because the mean of its divisors is an integer number (719259271).

Almost surely, 2^1438518541 is an apocalyptic number.

It is an amenable number.

1438518541 is a deficient number, since it is larger than the sum of its proper divisors (1).

1438518541 is an equidigital number, since it uses as much as digits as its factorization.

1438518541 is an evil number, because the sum of its binary digits is even.

The product of its digits is 76800, while the sum is 40.

The square root of 1438518541 is about 37927.8069627022. The cubic root of 1438518541 is about 1128.8558500325.

The spelling of 1438518541 in words is "one billion, four hundred thirty-eight million, five hundred eighteen thousand, five hundred forty-one".