1228618097 has 4 divisors (see below), whose sum is σ = 1404134976. Its totient is φ = 1053101220.

The previous prime is 1228618073. The next prime is 1228618099. The reversal of 1228618097 is 7908168221.

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: 7908168221 = 71 ⋅111382651.

It is a cyclic number.

It is not a de Polignac number, because 1228618097 - 2¹⁰ = 1228617073 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1228618099) 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, 87758429 + ... + 87758442.

It is an arithmetic number, because the mean of its divisors is an integer number (351033744).

Almost surely, 2^1228618097 is an apocalyptic number.

It is an amenable number.

1228618097 is a deficient number, since it is larger than the sum of its proper divisors (175516879).

1228618097 is an equidigital number, since it uses as much as digits as its factorization.

1228618097 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 175516878.

The product of its (nonzero) digits is 96768, while the sum is 44.

The square root of 1228618097 is about 35051.6489911673. The cubic root of 1228618097 is about 1071.0398651527.

The spelling of 1228618097 in words is "one billion, two hundred twenty-eight million, six hundred eighteen thousand, ninety-seven".