1055871999 has 48 divisors (see below), whose sum is σ = 1880424000. Its totient is φ = 555959808.

The previous prime is 1055871979. The next prime is 1055872001. The reversal of 1055871999 is 9991785501.

1055871999 is a `hidden beast` number, since 10 + 558 + 71 + 9 + 9 + 9 = 666.

It is not a de Polignac number, because 1055871999 - 2⁷ = 1055871871 is a prime.

It is a super-2 number, since 2×1055871999² = 2229731356544512002, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1055871959) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 858517 + ... + 859745.

It is an arithmetic number, because the mean of its divisors is an integer number (39175500).

Almost surely, 2^1055871999 is an apocalyptic number.

1055871999 is a deficient number, since it is larger than the sum of its proper divisors (824552001).

1055871999 is a wasteful number, since it uses less digits than its factorization.

1055871999 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2304 (or 2301 counting only the distinct ones).

The product of its (nonzero) digits is 1020600, while the sum is 54.

The square root of 1055871999 is about 32494.1840796165. The cubic root of 1055871999 is about 1018.2875273550.

The spelling of 1055871999 in words is "one billion, fifty-five million, eight hundred seventy-one thousand, nine hundred ninety-nine".