1530139123 has 2 divisors, whose sum is σ = 1530139124. Its totient is φ = 1530139122.

The previous prime is 1530139063. The next prime is 1530139153. The reversal of 1530139123 is 3219310351.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1530139123 - 2⁹ = 1530138611 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1530139091 and 1530139100.

It is not a weakly prime, because it can be changed into another prime (1530139153) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 765069561 + 765069562.

It is an arithmetic number, because the mean of its divisors is an integer number (765069562).

Almost surely, 2^1530139123 is an apocalyptic number.

1530139123 is a deficient number, since it is larger than the sum of its proper divisors (1).

1530139123 is an equidigital number, since it uses as much as digits as its factorization.

1530139123 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2430, while the sum is 28.

The square root of 1530139123 is about 39116.9927652932. The cubic root of 1530139123 is about 1152.3302775498.

Adding to 1530139123 its reverse (3219310351), we get a palindrome (4749449474).

The spelling of 1530139123 in words is "one billion, five hundred thirty million, one hundred thirty-nine thousand, one hundred twenty-three".