1115231329 has 2 divisors, whose sum is σ = 1115231330. Its totient is φ = 1115231328.

The previous prime is 1115231209. The next prime is 1115231339. The reversal of 1115231329 is 9231325111.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 736851025 + 378380304 = 27145^2 + 19452^2 .

It is a cyclic number.

It is not a de Polignac number, because 1115231329 - 2²³ = 1106842721 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1115231297 and 1115231306.

It is not a weakly prime, because it can be changed into another prime (1115231339) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 557615664 + 557615665.

It is an arithmetic number, because the mean of its divisors is an integer number (557615665).

Almost surely, 2^1115231329 is an apocalyptic number.

It is an amenable number.

1115231329 is a deficient number, since it is larger than the sum of its proper divisors (1).

1115231329 is an equidigital number, since it uses as much as digits as its factorization.

1115231329 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1620, while the sum is 28.

The square root of 1115231329 is about 33395.0794129914. The cubic root of 1115231329 is about 1037.0228369293.

The spelling of 1115231329 in words is "one billion, one hundred fifteen million, two hundred thirty-one thousand, three hundred twenty-nine".