1099279 has 2 divisors, whose sum is σ = 1099280. Its totient is φ = 1099278.

The previous prime is 1099261. The next prime is 1099289. The reversal of 1099279 is 9729901.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1099279 - 2⁵ = 1099247 is a prime.

It is an Ulam number.

1099279 is a lucky number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1099249) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 549639 + 549640.

It is an arithmetic number, because the mean of its divisors is an integer number (549640).

2^1099279 is an apocalyptic number.

1099279 is a deficient number, since it is larger than the sum of its proper divisors (1).

1099279 is an equidigital number, since it uses as much as digits as its factorization.

1099279 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 10206, while the sum is 37.

The square root of 1099279 is about 1048.4650685645. The cubic root of 1099279 is about 103.2054528597.

It can be divided in two parts, 1099 and 279, that added together give a triangular number (1378 = T₅₂).

The spelling of 1099279 in words is "one million, ninety-nine thousand, two hundred seventy-nine".