1020123523 has 2 divisors, whose sum is σ = 1020123524. Its totient is φ = 1020123522.

The previous prime is 1020123491. The next prime is 1020123553. The reversal of 1020123523 is 3253210201.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1020123523 - 2⁵ = 1020123491 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1020123523.

It is not a weakly prime, because it can be changed into another prime (1020123553) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 510061761 + 510061762.

It is an arithmetic number, because the mean of its divisors is an integer number (510061762).

Almost surely, 2^1020123523 is an apocalyptic number.

1020123523 is a deficient number, since it is larger than the sum of its proper divisors (1).

1020123523 is an equidigital number, since it uses as much as digits as its factorization.

1020123523 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 360, while the sum is 19.

The square root of 1020123523 is about 31939.3726143768. The cubic root of 1020123523 is about 1006.6633422523.

Adding to 1020123523 its reverse (3253210201), we get a palindrome (4273333724).

The spelling of 1020123523 in words is "one billion, twenty million, one hundred twenty-three thousand, five hundred twenty-three".