1161809359 has 8 divisors (see below), whose sum is σ = 1294896240. Its totient is φ = 1035916416.

The previous prime is 1161809347. The next prime is 1161809371. The reversal of 1161809359 is 9539081611.

It is an interprime number because it is at equal distance from previous prime (1161809347) and next prime (1161809371).

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1161809359 - 2⁹ = 1161808847 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1161809329) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1798144 + ... + 1798789.

It is an arithmetic number, because the mean of its divisors is an integer number (161862030).

Almost surely, 2^1161809359 is an apocalyptic number.

1161809359 is a gapful number since it is divisible by the number (19) formed by its first and last digit.

1161809359 is a deficient number, since it is larger than the sum of its proper divisors (133086881).

1161809359 is a wasteful number, since it uses less digits than its factorization.

1161809359 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3596969.

The product of its (nonzero) digits is 58320, while the sum is 43.

The square root of 1161809359 is about 34085.3246867329. The cubic root of 1161809359 is about 1051.2635910796.

The spelling of 1161809359 in words is "one billion, one hundred sixty-one million, eight hundred nine thousand, three hundred fifty-nine".