1123372813 has 2 divisors, whose sum is σ = 1123372814. Its totient is φ = 1123372812.

The previous prime is 1123372787. The next prime is 1123372819. The reversal of 1123372813 is 3182733211.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 753118249 + 370254564 = 27443^2 + 19242^2 .

It is a cyclic number.

It is not a de Polignac number, because 1123372813 - 2⁹ = 1123372301 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1123372819) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 561686406 + 561686407.

It is an arithmetic number, because the mean of its divisors is an integer number (561686407).

Almost surely, 2^1123372813 is an apocalyptic number.

It is an amenable number.

1123372813 is a deficient number, since it is larger than the sum of its proper divisors (1).

1123372813 is an equidigital number, since it uses as much as digits as its factorization.

1123372813 is an evil number, because the sum of its binary digits is even.

The product of its digits is 6048, while the sum is 31.

The square root of 1123372813 is about 33516.7542133781. The cubic root of 1123372813 is about 1039.5402347074.

The spelling of 1123372813 in words is "one billion, one hundred twenty-three million, three hundred seventy-two thousand, eight hundred thirteen".