1538407823 has 2 divisors, whose sum is σ = 1538407824. Its totient is φ = 1538407822.

The previous prime is 1538407813. The next prime is 1538407859. The reversal of 1538407823 is 3287048351.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1538407823 - 2¹⁰ = 1538406799 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1538407813) 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, 769203911 + 769203912.

It is an arithmetic number, because the mean of its divisors is an integer number (769203912).

Almost surely, 2^1538407823 is an apocalyptic number.

1538407823 is a deficient number, since it is larger than the sum of its proper divisors (1).

1538407823 is an equidigital number, since it uses as much as digits as its factorization.

1538407823 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 161280, while the sum is 41.

The square root of 1538407823 is about 39222.5422811933. The cubic root of 1538407823 is about 1154.4022376143.

The spelling of 1538407823 in words is "one billion, five hundred thirty-eight million, four hundred seven thousand, eight hundred twenty-three".