1202023189 has 2 divisors, whose sum is σ = 1202023190. Its totient is φ = 1202023188.

The previous prime is 1202023177. The next prime is 1202023253. The reversal of 1202023189 is 9813202021.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 727219089 + 474804100 = 26967^2 + 21790^2 .

It is a cyclic number.

It is not a de Polignac number, because 1202023189 - 2⁹ = 1202022677 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1202023129) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 601011594 + 601011595.

It is an arithmetic number, because the mean of its divisors is an integer number (601011595).

Almost surely, 2^1202023189 is an apocalyptic number.

It is an amenable number.

1202023189 is a deficient number, since it is larger than the sum of its proper divisors (1).

1202023189 is an equidigital number, since it uses as much as digits as its factorization.

1202023189 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 1202023189 is about 34670.2060709192. The cubic root of 1202023189 is about 1063.2554447348.

The spelling of 1202023189 in words is "one billion, two hundred two million, twenty-three thousand, one hundred eighty-nine".