1220779223 has 8 divisors (see below), whose sum is σ = 1262940336. Its totient is φ = 1179208000.

The previous prime is 1220779213. The next prime is 1220779243. The reversal of 1220779223 is 3229770221.

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 1220779223 - 2¹⁴ = 1220762839 is a prime.

It is a super-2 number, since 2×1220779223² = 2980603822616967458, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1220779213) 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, 143261 + ... + 151542.

It is an arithmetic number, because the mean of its divisors is an integer number (157867542).

Almost surely, 2^1220779223 is an apocalyptic number.

1220779223 is a deficient number, since it is larger than the sum of its proper divisors (42161113).

1220779223 is a wasteful number, since it uses less digits than its factorization.

1220779223 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 294945.

The product of its (nonzero) digits is 21168, while the sum is 35.

The square root of 1220779223 is about 34939.6511573885. The cubic root of 1220779223 is about 1068.7571743394.

The spelling of 1220779223 in words is "one billion, two hundred twenty million, seven hundred seventy-nine thousand, two hundred twenty-three".