1102279891 has 4 divisors (see below), whose sum is σ = 1103908752. Its totient is φ = 1100651032.

The previous prime is 1102279883. The next prime is 1102279903. The reversal of 1102279891 is 1989722011.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1102279891 - 2³ = 1102279883 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1102270891) 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, 813415 + ... + 814768.

It is an arithmetic number, because the mean of its divisors is an integer number (275977188).

Almost surely, 2^1102279891 is an apocalyptic number.

1102279891 is a deficient number, since it is larger than the sum of its proper divisors (1628861).

1102279891 is an equidigital number, since it uses as much as digits as its factorization.

1102279891 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1628860.

The product of its (nonzero) digits is 18144, while the sum is 40.

The square root of 1102279891 is about 33200.6007626368. The cubic root of 1102279891 is about 1032.9928009252.

The spelling of 1102279891 in words is "one billion, one hundred two million, two hundred seventy-nine thousand, eight hundred ninety-one".