1115661319 has 2 divisors, whose sum is σ = 1115661320. Its totient is φ = 1115661318.

The previous prime is 1115661307. The next prime is 1115661341. The reversal of 1115661319 is 9131665111.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1115661319 - 2⁹ = 1115660807 is a prime.

It is a super-2 number, since 2×1115661319² = 2489400357425639522, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1115665319) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 557830659 + 557830660.

It is an arithmetic number, because the mean of its divisors is an integer number (557830660).

Almost surely, 2^1115661319 is an apocalyptic number.

1115661319 is a deficient number, since it is larger than the sum of its proper divisors (1).

1115661319 is an equidigital number, since it uses as much as digits as its factorization.

1115661319 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 4860, while the sum is 34.

The square root of 1115661319 is about 33401.5167170594. The cubic root of 1115661319 is about 1037.1560984156.

The spelling of 1115661319 in words is "one billion, one hundred fifteen million, six hundred sixty-one thousand, three hundred nineteen".