1540986423 has 4 divisors (see below), whose sum is σ = 2054648568. Its totient is φ = 1027324280.

The previous prime is 1540986413. The next prime is 1540986451. The reversal of 1540986423 is 3246890451.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1540986423 - 2⁹ = 1540985911 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1540986413) 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 in 3 ways as a sum of consecutive naturals, for example, 256831068 + ... + 256831073.

It is an arithmetic number, because the mean of its divisors is an integer number (513662142).

Almost surely, 2^1540986423 is an apocalyptic number.

1540986423 is a deficient number, since it is larger than the sum of its proper divisors (513662145).

1540986423 is an equidigital number, since it uses as much as digits as its factorization.

1540986423 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 513662144.

The product of its (nonzero) digits is 207360, while the sum is 42.

The square root of 1540986423 is about 39255.3999215395. The cubic root of 1540986423 is about 1155.0468607887.

The spelling of 1540986423 in words is "one billion, five hundred forty million, nine hundred eighty-six thousand, four hundred twenty-three".