1020123329 has 2 divisors, whose sum is σ = 1020123330. Its totient is φ = 1020123328.

The previous prime is 1020123317. The next prime is 1020123361. The reversal of 1020123329 is 9233210201.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 987404929 + 32718400 = 31423^2 + 5720^2 .

It is a cyclic number.

It is not a de Polignac number, because 1020123329 - 2²⁰ = 1019074753 is a prime.

It is not a weakly prime, because it can be changed into another prime (1020120329) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 510061664 + 510061665.

It is an arithmetic number, because the mean of its divisors is an integer number (510061665).

Almost surely, 2^1020123329 is an apocalyptic number.

It is an amenable number.

1020123329 is a deficient number, since it is larger than the sum of its proper divisors (1).

1020123329 is an equidigital number, since it uses as much as digits as its factorization.

1020123329 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 648, while the sum is 23.

The square root of 1020123329 is about 31939.3695773727. The cubic root of 1020123329 is about 1006.6632784389.

The spelling of 1020123329 in words is "one billion, twenty million, one hundred twenty-three thousand, three hundred twenty-nine".