1011123389 has 2 divisors, whose sum is σ = 1011123390. Its totient is φ = 1011123388.

The previous prime is 1011123359. The next prime is 1011123403. The reversal of 1011123389 is 9833211101.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 573602500 + 437520889 = 23950^2 + 20917^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1011123389 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1011123329) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 505561694 + 505561695.

It is an arithmetic number, because the mean of its divisors is an integer number (505561695).

Almost surely, 2^1011123389 is an apocalyptic number.

It is an amenable number.

1011123389 is a deficient number, since it is larger than the sum of its proper divisors (1).

1011123389 is an equidigital number, since it uses as much as digits as its factorization.

1011123389 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 1011123389 is about 31798.1664408500. The cubic root of 1011123389 is about 1003.6941329112.

The spelling of 1011123389 in words is "one billion, eleven million, one hundred twenty-three thousand, three hundred eighty-nine".