1540441069 has 2 divisors, whose sum is σ = 1540441070. Its totient is φ = 1540441068.

The previous prime is 1540441033. The next prime is 1540441291. The reversal of 1540441069 is 9601440451.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1444988169 + 95452900 = 38013^2 + 9770^2 .

It is an emirp because it is prime and its reverse (9601440451) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1540441069 - 2²⁷ = 1406223341 is a prime.

It is a super-2 number, since 2×1540441069² = 4745917374123725522, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1540411069) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 770220534 + 770220535.

It is an arithmetic number, because the mean of its divisors is an integer number (770220535).

Almost surely, 2^1540441069 is an apocalyptic number.

It is an amenable number.

1540441069 is a deficient number, since it is larger than the sum of its proper divisors (1).

1540441069 is an equidigital number, since it uses as much as digits as its factorization.

1540441069 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 17280, while the sum is 34.

The square root of 1540441069 is about 39248.4530777966. The cubic root of 1540441069 is about 1154.9105879574.

The spelling of 1540441069 in words is "one billion, five hundred forty million, four hundred forty-one thousand, sixty-nine".