1223905801 has 4 divisors (see below), whose sum is σ = 1253757204. Its totient is φ = 1194054400.

The previous prime is 1223905789. The next prime is 1223905807. The reversal of 1223905801 is 1085093221.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 70963776 + 1152942025 = 8424^2 + 33955^2 .

It is a cyclic number.

It is not a de Polignac number, because 1223905801 - 2¹⁹ = 1223381513 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1223905807) 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 3 ways as a sum of consecutive naturals, for example, 14925640 + ... + 14925721.

It is an arithmetic number, because the mean of its divisors is an integer number (313439301).

Almost surely, 2^1223905801 is an apocalyptic number.

It is an amenable number.

1223905801 is a deficient number, since it is larger than the sum of its proper divisors (29851403).

1223905801 is an equidigital number, since it uses as much as digits as its factorization.

1223905801 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29851402.

The product of its (nonzero) digits is 4320, while the sum is 31.

The square root of 1223905801 is about 34984.3650935672. The cubic root of 1223905801 is about 1069.6688062811.

The spelling of 1223905801 in words is "one billion, two hundred twenty-three million, nine hundred five thousand, eight hundred one".