1540510949 has 2 divisors, whose sum is σ = 1540510950. Its totient is φ = 1540510948.

The previous prime is 1540510877. The next prime is 1540511009. The reversal of 1540510949 is 9490150451.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1463598049 + 76912900 = 38257^2 + 8770^2 .

It is a cyclic number.

It is not a de Polignac number, because 1540510949 - 2⁸ = 1540510693 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1540510549) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 770255474 + 770255475.

It is an arithmetic number, because the mean of its divisors is an integer number (770255475).

Almost surely, 2^1540510949 is an apocalyptic number.

It is an amenable number.

1540510949 is a deficient number, since it is larger than the sum of its proper divisors (1).

1540510949 is an equidigital number, since it uses as much as digits as its factorization.

1540510949 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 32400, while the sum is 38.

The square root of 1540510949 is about 39249.3432938693. The cubic root of 1540510949 is about 1154.9280513392.

The spelling of 1540510949 in words is "one billion, five hundred forty million, five hundred ten thousand, nine hundred forty-nine".