1156093985 has 4 divisors (see below), whose sum is σ = 1387312788. Its totient is φ = 924875184.

The previous prime is 1156093973. The next prime is 1156093987. The reversal of 1156093985 is 5893906511.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 840072256 + 316021729 = 28984^2 + 17777^2 .

It is a cyclic number.

It is not a de Polignac number, because 1156093985 - 2¹⁰ = 1156092961 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (1156093987) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 115609394 + ... + 115609403.

It is an arithmetic number, because the mean of its divisors is an integer number (346828197).

Almost surely, 2^1156093985 is an apocalyptic number.

It is an amenable number.

1156093985 is a deficient number, since it is larger than the sum of its proper divisors (231218803).

1156093985 is an equidigital number, since it uses as much as digits as its factorization.

1156093985 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 231218802.

The product of its (nonzero) digits is 291600, while the sum is 47.

The square root of 1156093985 is about 34001.3821042616. The cubic root of 1156093985 is about 1049.5369038720.

The spelling of 1156093985 in words is "one billion, one hundred fifty-six million, ninety-three thousand, nine hundred eighty-five".