1155086869 has 4 divisors (see below), whose sum is σ = 1155206080. Its totient is φ = 1154967660.

The previous prime is 1155086861. The next prime is 1155086897. The reversal of 1155086869 is 9686805511.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 1155086869 - 2³ = 1155086861 is a prime.

It is a super-2 number, since 2×1155086869² = 2668451349872446322, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1155086861) 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, 43647 + ... + 64924.

It is an arithmetic number, because the mean of its divisors is an integer number (288801520).

Almost surely, 2^1155086869 is an apocalyptic number.

It is an amenable number.

1155086869 is a deficient number, since it is larger than the sum of its proper divisors (119211).

1155086869 is a wasteful number, since it uses less digits than its factorization.

1155086869 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 119210.

The product of its (nonzero) digits is 518400, while the sum is 49.

The square root of 1155086869 is about 33986.5689501015. The cubic root of 1155086869 is about 1049.2320519300.

The spelling of 1155086869 in words is "one billion, one hundred fifty-five million, eighty-six thousand, eight hundred sixty-nine".