227279989 has 4 divisors (see below), whose sum is σ = 235117260. Its totient is φ = 219442720.

The previous prime is 227279963. The next prime is 227279999. The reversal of 227279989 is 989972722.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 989972722 = 2 ⋅494986361.

It can be written as a sum of positive squares in 2 ways, for example, as 145684900 + 81595089 = 12070^2 + 9033^2 .

It is a cyclic number.

It is not a de Polignac number, because 227279989 - 2¹⁹ = 226755701 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 (227279939) 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, 3918592 + ... + 3918649.

It is an arithmetic number, because the mean of its divisors is an integer number (58779315).

Almost surely, 2^227279989 is an apocalyptic number.

227279989 is a gapful number since it is divisible by the number (29) formed by its first and last digit.

It is an amenable number.

227279989 is a deficient number, since it is larger than the sum of its proper divisors (7837271).

227279989 is an equidigital number, since it uses as much as digits as its factorization.

227279989 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7837270.

The product of its digits is 2286144, while the sum is 55.

The square root of 227279989 is about 15075.8080712113. The cubic root of 227279989 is about 610.2677217734.

The spelling of 227279989 in words is "two hundred twenty-seven million, two hundred seventy-nine thousand, nine hundred eighty-nine".