379928589661 has 4 divisors (see below), whose sum is σ = 379930538524. Its totient is φ = 379926640800.

The previous prime is 379928589653. The next prime is 379928589739. The reversal of 379928589661 is 166985829973.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 166985829973 = 13513 ⋅12357421.

It can be written as a sum of positive squares in 2 ways, for example, as 29856384100 + 350072205561 = 172790^2 + 591669^2 .

It is a cyclic number.

It is not a de Polignac number, because 379928589661 - 2³ = 379928589653 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 (379928589641) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 644850 + ... + 1084291.

It is an arithmetic number, because the mean of its divisors is an integer number (94982634631).

Almost surely, 2^379928589661 is an apocalyptic number.

It is an amenable number.

379928589661 is a deficient number, since it is larger than the sum of its proper divisors (1948863).

379928589661 is a wasteful number, since it uses less digits than its factorization.

379928589661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1948862.

The product of its digits is 352719360, while the sum is 73.

The spelling of 379928589661 in words is "three hundred seventy-nine billion, nine hundred twenty-eight million, five hundred eighty-nine thousand, six hundred sixty-one".