1979166923 has 4 divisors (see below), whose sum is σ = 1982460648. Its totient is φ = 1975873200.

The previous prime is 1979166913. The next prime is 1979166953. The reversal of 1979166923 is 3296619791.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 3296619791 = 2707 ⋅1217813.

It is a cyclic number.

It is not a de Polignac number, because 1979166923 - 2¹² = 1979162827 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1979166913) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1645961 + ... + 1647162.

It is an arithmetic number, because the mean of its divisors is an integer number (495615162).

Almost surely, 2^1979166923 is an apocalyptic number.

1979166923 is a deficient number, since it is larger than the sum of its proper divisors (3293725).

1979166923 is an equidigital number, since it uses as much as digits as its factorization.

1979166923 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3293724.

The product of its digits is 1102248, while the sum is 53.

The square root of 1979166923 is about 44487.8289310683. The cubic root of 1979166923 is about 1255.5310996901.

The spelling of 1979166923 in words is "one billion, nine hundred seventy-nine million, one hundred sixty-six thousand, nine hundred twenty-three".