2161977323 has 8 divisors (see below), whose sum is σ = 2370871296. Its totient is φ = 1955141800.

The previous prime is 2161977287. The next prime is 2161977341. The reversal of 2161977323 is 3237791612.

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 2161977323 - 2²⁴ = 2145200107 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2161977343) 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, 512411 + ... + 516612.

It is an arithmetic number, because the mean of its divisors is an integer number (296358912).

Almost surely, 2^2161977323 is an apocalyptic number.

2161977323 is a deficient number, since it is larger than the sum of its proper divisors (208893973).

2161977323 is a wasteful number, since it uses less digits than its factorization.

2161977323 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1029225.

The product of its digits is 95256, while the sum is 41.

The square root of 2161977323 is about 46497.0678968040. The cubic root of 2161977323 is about 1293.0551393908.

The spelling of 2161977323 in words is "two billion, one hundred sixty-one million, nine hundred seventy-seven thousand, three hundred twenty-three".