1128381923 has 2 divisors, whose sum is σ = 1128381924. Its totient is φ = 1128381922.

The previous prime is 1128381911. The next prime is 1128381931. The reversal of 1128381923 is 3291838211.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1128381923 - 2¹² = 1128377827 is a prime.

It is not a weakly prime, because it can be changed into another prime (1128381973) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 564190961 + 564190962.

It is an arithmetic number, because the mean of its divisors is an integer number (564190962).

Almost surely, 2^1128381923 is an apocalyptic number.

1128381923 is a deficient number, since it is larger than the sum of its proper divisors (1).

1128381923 is an equidigital number, since it uses as much as digits as its factorization.

1128381923 is an evil number, because the sum of its binary digits is even.

The product of its digits is 20736, while the sum is 38.

The square root of 1128381923 is about 33591.3965622152. The cubic root of 1128381923 is about 1041.0830442606.

The spelling of 1128381923 in words is "one billion, one hundred twenty-eight million, three hundred eighty-one thousand, nine hundred twenty-three".