1023123091 has 2 divisors, whose sum is σ = 1023123092. Its totient is φ = 1023123090.

The previous prime is 1023123083. The next prime is 1023123097. The reversal of 1023123091 is 1903213201.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1023123091 - 2³ = 1023123083 is a prime.

It is not a weakly prime, because it can be changed into another prime (1023123097) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 511561545 + 511561546.

It is an arithmetic number, because the mean of its divisors is an integer number (511561546).

Almost surely, 2^1023123091 is an apocalyptic number.

1023123091 is a deficient number, since it is larger than the sum of its proper divisors (1).

1023123091 is an equidigital number, since it uses as much as digits as its factorization.

1023123091 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 324, while the sum is 22.

The square root of 1023123091 is about 31986.2953622329. The cubic root of 1023123091 is about 1007.6490400107.

Adding to 1023123091 its reverse (1903213201), we get a palindrome (2926336292).

The spelling of 1023123091 in words is "one billion, twenty-three million, one hundred twenty-three thousand, ninety-one".