1085909353 has 4 divisors (see below), whose sum is σ = 1085990020. Its totient is φ = 1085828688.

The previous prime is 1085909351. The next prime is 1085909387. The reversal of 1085909353 is 3539095801.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 3539095801 = 8293 ⋅426757.

It can be written as a sum of positive squares in 2 ways, for example, as 782209024 + 303700329 = 27968^2 + 17427^2 .

It is a cyclic number.

It is not a de Polignac number, because 1085909353 - 2¹ = 1085909351 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1085909351) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 14718 + ... + 48871.

It is an arithmetic number, because the mean of its divisors is an integer number (271497505).

Almost surely, 2^1085909353 is an apocalyptic number.

It is an amenable number.

1085909353 is a deficient number, since it is larger than the sum of its proper divisors (80667).

1085909353 is an equidigital number, since it uses as much as digits as its factorization.

1085909353 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 80666.

The product of its (nonzero) digits is 145800, while the sum is 43.

The square root of 1085909353 is about 32953.1387427662. The cubic root of 1085909353 is about 1027.8534341783.

The spelling of 1085909353 in words is "one billion, eighty-five million, nine hundred nine thousand, three hundred fifty-three".