1123400357 has 2 divisors, whose sum is σ = 1123400358. Its totient is φ = 1123400356.

The previous prime is 1123400353. The next prime is 1123400371. The reversal of 1123400357 is 7530043211.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 880071556 + 243328801 = 29666^2 + 15599^2 .

It is a cyclic number.

It is not a de Polignac number, because 1123400357 - 2² = 1123400353 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1123400353) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 561700178 + 561700179.

It is an arithmetic number, because the mean of its divisors is an integer number (561700179).

Almost surely, 2^1123400357 is an apocalyptic number.

It is an amenable number.

1123400357 is a deficient number, since it is larger than the sum of its proper divisors (1).

1123400357 is an equidigital number, since it uses as much as digits as its factorization.

1123400357 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2520, while the sum is 26.

The square root of 1123400357 is about 33517.1651098359. The cubic root of 1123400357 is about 1039.5487308071.

Adding to 1123400357 its reverse (7530043211), we get a palindrome (8653443568).

The spelling of 1123400357 in words is "one billion, one hundred twenty-three million, four hundred thousand, three hundred fifty-seven".