164193979 has 2 divisors, whose sum is σ = 164193980. Its totient is φ = 164193978.

The previous prime is 164193943. The next prime is 164194013. The reversal of 164193979 is 979391461.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 164193979 - 2⁷ = 164193851 is a prime.

It is not a weakly prime, because it can be changed into another prime (164193919) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 82096989 + 82096990.

It is an arithmetic number, because the mean of its divisors is an integer number (82096990).

Almost surely, 2^164193979 is an apocalyptic number.

164193979 is a deficient number, since it is larger than the sum of its proper divisors (1).

164193979 is an equidigital number, since it uses as much as digits as its factorization.

164193979 is an evil number, because the sum of its binary digits is even.

The product of its digits is 367416, while the sum is 49.

The square root of 164193979 is about 12813.8198442151. The cubic root of 164193979 is about 547.5860921169.

The spelling of 164193979 in words is "one hundred sixty-four million, one hundred ninety-three thousand, nine hundred seventy-nine".