1227394217 has 4 divisors (see below), whose sum is σ = 1402736256. Its totient is φ = 1052052180.

The previous prime is 1227394211. The next prime is 1227394277. The reversal of 1227394217 is 7124937221.

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.

It is a cyclic number.

It is not a de Polignac number, because 1227394217 - 2¹² = 1227390121 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1227394211) 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, 87671009 + ... + 87671022.

It is an arithmetic number, because the mean of its divisors is an integer number (350684064).

Almost surely, 2^1227394217 is an apocalyptic number.

It is an amenable number.

1227394217 is a deficient number, since it is larger than the sum of its proper divisors (175342039).

1227394217 is an equidigital number, since it uses as much as digits as its factorization.

1227394217 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 175342038.

The product of its digits is 42336, while the sum is 38.

The square root of 1227394217 is about 35034.1864041396. The cubic root of 1227394217 is about 1070.6841105123.

The spelling of 1227394217 in words is "one billion, two hundred twenty-seven million, three hundred ninety-four thousand, two hundred seventeen".