1023700189 has 2 divisors, whose sum is σ = 1023700190. Its totient is φ = 1023700188.

The previous prime is 1023700187. The next prime is 1023700229. The reversal of 1023700189 is 9810073201.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1023680025 + 20164 = 31995^2 + 142^2 .

It is a cyclic number.

It is not a de Polignac number, because 1023700189 - 2¹ = 1023700187 is a prime.

Together with 1023700187, it forms a pair of twin primes.

It is a self number, because there is not a number n which added to its sum of digits gives 1023700189.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1023700187) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 511850094 + 511850095.

It is an arithmetic number, because the mean of its divisors is an integer number (511850095).

Almost surely, 2^1023700189 is an apocalyptic number.

It is an amenable number.

1023700189 is a deficient number, since it is larger than the sum of its proper divisors (1).

1023700189 is an equidigital number, since it uses as much as digits as its factorization.

1023700189 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3024, while the sum is 31.

The square root of 1023700189 is about 31995.3151101845. The cubic root of 1023700189 is about 1007.8384609937.

The spelling of 1023700189 in words is "one billion, twenty-three million, seven hundred thousand, one hundred eighty-nine".