1220365623 has 8 divisors (see below), whose sum is σ = 1679643136. Its totient is φ = 787332600.

The previous prime is 1220365607. The next prime is 1220365637. The reversal of 1220365623 is 3265630221.

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

It is not a de Polignac number, because 1220365623 - 2⁴ = 1220365607 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 (1220365673) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6561013 + ... + 6561198.

It is an arithmetic number, because the mean of its divisors is an integer number (209955392).

Almost surely, 2^1220365623 is an apocalyptic number.

1220365623 is a deficient number, since it is larger than the sum of its proper divisors (459277513).

1220365623 is a wasteful number, since it uses less digits than its factorization.

1220365623 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13122245.

The product of its (nonzero) digits is 12960, while the sum is 30.

The square root of 1220365623 is about 34933.7318790879. The cubic root of 1220365623 is about 1068.6364623960.

Adding to 1220365623 its reverse (3265630221), we get a palindrome (4485995844).

The spelling of 1220365623 in words is "one billion, two hundred twenty million, three hundred sixty-five thousand, six hundred twenty-three".