1313012189 has 2 divisors, whose sum is σ = 1313012190. Its totient is φ = 1313012188.

The previous prime is 1313012123. The next prime is 1313012231. The reversal of 1313012189 is 9812103131.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 762312100 + 550700089 = 27610^2 + 23467^2 .

It is a cyclic number.

It is not a de Polignac number, because 1313012189 - 2¹⁶ = 1312946653 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1313012489) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 656506094 + 656506095.

It is an arithmetic number, because the mean of its divisors is an integer number (656506095).

Almost surely, 2^1313012189 is an apocalyptic number.

It is an amenable number.

1313012189 is a deficient number, since it is larger than the sum of its proper divisors (1).

1313012189 is an equidigital number, since it uses as much as digits as its factorization.

1313012189 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1296, while the sum is 29.

The square root of 1313012189 is about 36235.5100557450. The cubic root of 1313012189 is about 1095.0221881342.

The spelling of 1313012189 in words is "one billion, three hundred thirteen million, twelve thousand, one hundred eighty-nine".