1540352549 has 2 divisors, whose sum is σ = 1540352550. Its totient is φ = 1540352548.

The previous prime is 1540352509. The next prime is 1540352551. The reversal of 1540352549 is 9452530451.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 839956324 + 700396225 = 28982^2 + 26465^2 .

It is a cyclic number.

It is not a de Polignac number, because 1540352549 - 2⁸ = 1540352293 is a prime.

Together with 1540352551, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1540352509) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 770176274 + 770176275.

It is an arithmetic number, because the mean of its divisors is an integer number (770176275).

Almost surely, 2^1540352549 is an apocalyptic number.

It is an amenable number.

1540352549 is a deficient number, since it is larger than the sum of its proper divisors (1).

1540352549 is an equidigital number, since it uses as much as digits as its factorization.

1540352549 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 108000, while the sum is 38.

The square root of 1540352549 is about 39247.3253738392. The cubic root of 1540352549 is about 1154.8884655827. Note that the first 3 decimals are identical.

The spelling of 1540352549 in words is "one billion, five hundred forty million, three hundred fifty-two thousand, five hundred forty-nine".