1023120289 has 2 divisors, whose sum is σ = 1023120290. Its totient is φ = 1023120288.

The previous prime is 1023120283. The next prime is 1023120313. The reversal of 1023120289 is 9820213201.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 713958400 + 309161889 = 26720^2 + 17583^2 .

It is a cyclic number.

It is not a de Polignac number, because 1023120289 - 2¹⁷ = 1022989217 is a prime.

It is not a weakly prime, because it can be changed into another prime (1023120283) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 511560144 + 511560145.

It is an arithmetic number, because the mean of its divisors is an integer number (511560145).

Almost surely, 2^1023120289 is an apocalyptic number.

It is an amenable number.

1023120289 is a deficient number, since it is larger than the sum of its proper divisors (1).

1023120289 is an equidigital number, since it uses as much as digits as its factorization.

1023120289 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1728, while the sum is 28.

The square root of 1023120289 is about 31986.2515621947. The cubic root of 1023120289 is about 1007.6481201360.

The spelling of 1023120289 in words is "one billion, twenty-three million, one hundred twenty thousand, two hundred eighty-nine".