1220975393 has 16 divisors (see below), whose sum is σ = 1376428032. Its totient is φ = 1073010000.

The previous prime is 1220975383. The next prime is 1220975419. The reversal of 1220975393 is 3935790221.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 1220975393 - 2⁸ = 1220975137 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 1220975393.

It is not an unprimeable number, because it can be changed into a prime (1220975303) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 518168 + ... + 520518.

It is an arithmetic number, because the mean of its divisors is an integer number (86026752).

Almost surely, 2^1220975393 is an apocalyptic number.

It is an amenable number.

1220975393 is a deficient number, since it is larger than the sum of its proper divisors (155452639).

1220975393 is a wasteful number, since it uses less digits than its factorization.

1220975393 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3916.

The product of its (nonzero) digits is 102060, while the sum is 41.

The square root of 1220975393 is about 34942.4583136333. The cubic root of 1220975393 is about 1068.8144183416.

The spelling of 1220975393 in words is "one billion, two hundred twenty million, nine hundred seventy-five thousand, three hundred ninety-three".