1089208277 has 4 divisors (see below), whose sum is σ = 1097522976. Its totient is φ = 1080893580.

The previous prime is 1089208273. The next prime is 1089208279. The reversal of 1089208277 is 7728029801.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 7728029801 = 63317 ⋅122053.

It is a cyclic number.

It is not a de Polignac number, because 1089208277 - 2² = 1089208273 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1089208271) 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, 4157153 + ... + 4157414.

It is an arithmetic number, because the mean of its divisors is an integer number (274380744).

Almost surely, 2^1089208277 is an apocalyptic number.

It is an amenable number.

1089208277 is a deficient number, since it is larger than the sum of its proper divisors (8314699).

1089208277 is an equidigital number, since it uses as much as digits as its factorization.

1089208277 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8314698.

The product of its (nonzero) digits is 112896, while the sum is 44.

The square root of 1089208277 is about 33003.1555612490. The cubic root of 1089208277 is about 1028.8932332025.

The spelling of 1089208277 in words is "one billion, eighty-nine million, two hundred eight thousand, two hundred seventy-seven".