1123863855 has 8 divisors (see below), whose sum is σ = 1798182192. Its totient is φ = 599394048.

The previous prime is 1123863823. The next prime is 1123863869. The reversal of 1123863855 is 5583683211.

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

It is not a de Polignac number, because 1123863855 - 2⁵ = 1123863823 is a prime.

It is a super-2 number, since 2×1123863855² = 2526139929150922050, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 37462114 + ... + 37462143.

It is an arithmetic number, because the mean of its divisors is an integer number (224772774).

Almost surely, 2^1123863855 is an apocalyptic number.

1123863855 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

1123863855 is a deficient number, since it is larger than the sum of its proper divisors (674318337).

1123863855 is an equidigital number, since it uses as much as digits as its factorization.

1123863855 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 74924265.

The product of its digits is 172800, while the sum is 42.

The square root of 1123863855 is about 33524.0787345454. The cubic root of 1123863855 is about 1039.6916785119.

The spelling of 1123863855 in words is "one billion, one hundred twenty-three million, eight hundred sixty-three thousand, eight hundred fifty-five".