1923991055 has 16 divisors (see below), whose sum is σ = 2753339904. Its totient is φ = 1261946400.

The previous prime is 1923991049. The next prime is 1923991061. The reversal of 1923991055 is 5501993291.

It is an interprime number because it is at equal distance from previous prime (1923991049) and next prime (1923991061).

It is not a de Polignac number, because 1923991055 - 2⁴ = 1923991039 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1923990997 and 1923991015.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1194221 + ... + 1195830.

It is an arithmetic number, because the mean of its divisors is an integer number (172083744).

Almost surely, 2^1923991055 is an apocalyptic number.

1923991055 is a deficient number, since it is larger than the sum of its proper divisors (829348849).

1923991055 is a wasteful number, since it uses less digits than its factorization.

1923991055 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2390086.

The product of its (nonzero) digits is 109350, while the sum is 44.

The square root of 1923991055 is about 43863.3224345808. The cubic root of 1923991055 is about 1243.7535963466.

The spelling of 1923991055 in words is "one billion, nine hundred twenty-three million, nine hundred ninety-one thousand, fifty-five".