1220405793 has 8 divisors (see below), whose sum is σ = 1627606656. Its totient is φ = 813404400.

The previous prime is 1220405749. The next prime is 1220405801. The reversal of 1220405793 is 3975040221.

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

It is not a de Polignac number, because 1220405793 - 2⁹ = 1220405281 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (1220405993) 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, 34953 + ... + 60518.

It is an arithmetic number, because the mean of its divisors is an integer number (203450832).

Almost surely, 2^1220405793 is an apocalyptic number.

It is an amenable number.

1220405793 is a deficient number, since it is larger than the sum of its proper divisors (407200863).

1220405793 is an equidigital number, since it uses as much as digits as its factorization.

1220405793 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 99735.

The product of its (nonzero) digits is 15120, while the sum is 33.

The square root of 1220405793 is about 34934.3068200873. The cubic root of 1220405793 is about 1068.6481874765.

The spelling of 1220405793 in words is "one billion, two hundred twenty million, four hundred five thousand, seven hundred ninety-three".