1620879199 has 8 divisors (see below), whose sum is σ = 1667737008. Its totient is φ = 1574370240.

The previous prime is 1620879187. The next prime is 1620879203. The reversal of 1620879199 is 9919780261.

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

It is a cyclic number.

It is not a de Polignac number, because 1620879199 - 2⁵ = 1620879167 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 (1620819199) 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, 77772 + ... + 96385.

It is an arithmetic number, because the mean of its divisors is an integer number (208467126).

Almost surely, 2^1620879199 is an apocalyptic number.

1620879199 is a deficient number, since it is larger than the sum of its proper divisors (46857809).

1620879199 is a wasteful number, since it uses less digits than its factorization.

1620879199 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 174425.

The product of its (nonzero) digits is 489888, while the sum is 52.

The square root of 1620879199 is about 40260.1440509097. The cubic root of 1620879199 is about 1174.6727198344.

The spelling of 1620879199 in words is "one billion, six hundred twenty million, eight hundred seventy-nine thousand, one hundred ninety-nine".