1123299857 has 2 divisors, whose sum is σ = 1123299858. Its totient is φ = 1123299856.

The previous prime is 1123299797. The next prime is 1123299869. The reversal of 1123299857 is 7589923211.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 962922961 + 160376896 = 31031^2 + 12664^2 .

It is a cyclic number.

It is not a de Polignac number, because 1123299857 - 2¹⁰ = 1123298833 is a prime.

It is not a weakly prime, because it can be changed into another prime (1123299257) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 561649928 + 561649929.

It is an arithmetic number, because the mean of its divisors is an integer number (561649929).

Almost surely, 2^1123299857 is an apocalyptic number.

It is an amenable number.

1123299857 is a deficient number, since it is larger than the sum of its proper divisors (1).

1123299857 is an equidigital number, since it uses as much as digits as its factorization.

1123299857 is an evil number, because the sum of its binary digits is even.

The product of its digits is 272160, while the sum is 47.

The square root of 1123299857 is about 33515.6658444973. The cubic root of 1123299857 is about 1039.5177303532.

The spelling of 1123299857 in words is "one billion, one hundred twenty-three million, two hundred ninety-nine thousand, eight hundred fifty-seven".