1539852449 has 2 divisors, whose sum is σ = 1539852450. Its totient is φ = 1539852448.

The previous prime is 1539852443. The next prime is 1539852451. The reversal of 1539852449 is 9442589351.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1156476049 + 383376400 = 34007^2 + 19580^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1539852449 is a prime.

It is a super-2 number, since 2×1539852449² = 4742291129382595202, which contains 22 as substring.

Together with 1539852451, it forms a pair of twin primes.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 1539852397 and 1539852406.

It is not a weakly prime, because it can be changed into another prime (1539852443) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 769926224 + 769926225.

It is an arithmetic number, because the mean of its divisors is an integer number (769926225).

Almost surely, 2^1539852449 is an apocalyptic number.

It is an amenable number.

1539852449 is a deficient number, since it is larger than the sum of its proper divisors (1).

1539852449 is an equidigital number, since it uses as much as digits as its factorization.

1539852449 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1555200, while the sum is 50.

The square root of 1539852449 is about 39240.9537218452. The cubic root of 1539852449 is about 1154.7634677399.

The spelling of 1539852449 in words is "one billion, five hundred thirty-nine million, eight hundred fifty-two thousand, four hundred forty-nine".