1222713777 has 8 divisors (see below), whose sum is σ = 1646426880. Its totient is φ = 807071600.

The previous prime is 1222713761. The next prime is 1222713799. The reversal of 1222713777 is 7773172221.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1222713777 - 2⁴ = 1222713761 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1222713077) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2017377 + ... + 2017982.

It is an arithmetic number, because the mean of its divisors is an integer number (205803360).

Almost surely, 2^1222713777 is an apocalyptic number.

It is an amenable number.

1222713777 is a deficient number, since it is larger than the sum of its proper divisors (423713103).

1222713777 is a wasteful number, since it uses less digits than its factorization.

1222713777 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4035463.

The product of its digits is 57624, while the sum is 39.

The square root of 1222713777 is about 34967.3244186626. The cubic root of 1222713777 is about 1069.3214252260.

Adding to 1222713777 its reverse (7773172221), we get a palindrome (8995885998).

The spelling of 1222713777 in words is "one billion, two hundred twenty-two million, seven hundred thirteen thousand, seven hundred seventy-seven".