1099699255 has 4 divisors (see below), whose sum is σ = 1319639112. Its totient is φ = 879759400.

The previous prime is 1099699231. The next prime is 1099699259. The reversal of 1099699255 is 5529969901.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 5529969901 = 79 ⋅69999619.

It is a de Polignac number, because none of the positive numbers 2^k-1099699255 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1099699196 and 1099699205.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1099699259) 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, 109969921 + ... + 109969930.

It is an arithmetic number, because the mean of its divisors is an integer number (329909778).

Almost surely, 2^1099699255 is an apocalyptic number.

1099699255 is a deficient number, since it is larger than the sum of its proper divisors (219939857).

1099699255 is an equidigital number, since it uses as much as digits as its factorization.

1099699255 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 219939856.

The product of its (nonzero) digits is 1968300, while the sum is 55.

The square root of 1099699255 is about 33161.7136921481. The cubic root of 1099699255 is about 1032.1860301895.

The spelling of 1099699255 in words is "one billion, ninety-nine million, six hundred ninety-nine thousand, two hundred fifty-five".