1115351609 has 2 divisors, whose sum is σ = 1115351610. Its totient is φ = 1115351608.

The previous prime is 1115351591. The next prime is 1115351639. The reversal of 1115351609 is 9061535111.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1112556025 + 2795584 = 33355^2 + 1672^2 .

It is a cyclic number.

It is not a de Polignac number, because 1115351609 - 2²⁰ = 1114303033 is a prime.

It is not a weakly prime, because it can be changed into another prime (1115351639) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 557675804 + 557675805.

It is an arithmetic number, because the mean of its divisors is an integer number (557675805).

Almost surely, 2^1115351609 is an apocalyptic number.

It is an amenable number.

1115351609 is a deficient number, since it is larger than the sum of its proper divisors (1).

1115351609 is an equidigital number, since it uses as much as digits as its factorization.

1115351609 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4050, while the sum is 32.

The square root of 1115351609 is about 33396.8802285483. The cubic root of 1115351609 is about 1037.0601172733.

The spelling of 1115351609 in words is "one billion, one hundred fifteen million, three hundred fifty-one thousand, six hundred nine".