1540085293 has 2 divisors, whose sum is σ = 1540085294. Its totient is φ = 1540085292.

The previous prime is 1540085263. The next prime is 1540085297. The reversal of 1540085293 is 3925800451.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 895026889 + 645058404 = 29917^2 + 25398^2 .

It is an emirp because it is prime and its reverse (3925800451) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1540085293 - 2²¹ = 1537988141 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1540085297) 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, 770042646 + 770042647.

It is an arithmetic number, because the mean of its divisors is an integer number (770042647).

Almost surely, 2^1540085293 is an apocalyptic number.

It is an amenable number.

1540085293 is a deficient number, since it is larger than the sum of its proper divisors (1).

1540085293 is an equidigital number, since it uses as much as digits as its factorization.

1540085293 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 43200, while the sum is 37.

The square root of 1540085293 is about 39243.9204590979. The cubic root of 1540085293 is about 1154.8216694621.

The spelling of 1540085293 in words is "one billion, five hundred forty million, eighty-five thousand, two hundred ninety-three".