1601223679 has 4 divisors (see below), whose sum is σ = 1746789480. Its totient is φ = 1455657880.

The previous prime is 1601223671. The next prime is 1601223691. The reversal of 1601223679 is 9763221061.

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

It is a cyclic number.

It is not a de Polignac number, because 1601223679 - 2³ = 1601223671 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 (1601223671) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 72782884 + ... + 72782905.

It is an arithmetic number, because the mean of its divisors is an integer number (436697370).

Almost surely, 2^1601223679 is an apocalyptic number.

1601223679 is a deficient number, since it is larger than the sum of its proper divisors (145565801).

1601223679 is a wasteful number, since it uses less digits than its factorization.

1601223679 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 145565800.

The product of its (nonzero) digits is 27216, while the sum is 37.

The square root of 1601223679 is about 40015.2930640274. The cubic root of 1601223679 is about 1169.9051908954.

The spelling of 1601223679 in words is "one billion, six hundred one million, two hundred twenty-three thousand, six hundred seventy-nine".