164878279 has 2 divisors, whose sum is σ = 164878280. Its totient is φ = 164878278.

The previous prime is 164878277. The next prime is 164878331. The reversal of 164878279 is 972878461.

It is an a-pointer prime, because the next prime (164878331) can be obtained adding 164878279 to its sum of digits (52).

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 164878279 - 2¹ = 164878277 is a prime.

Together with 164878277, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (164878271) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 82439139 + 82439140.

It is an arithmetic number, because the mean of its divisors is an integer number (82439140).

Almost surely, 2^164878279 is an apocalyptic number.

164878279 is a deficient number, since it is larger than the sum of its proper divisors (1).

164878279 is an equidigital number, since it uses as much as digits as its factorization.

164878279 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1354752, while the sum is 52.

The square root of 164878279 is about 12840.4937210374. The cubic root of 164878279 is about 548.3457501174.

The spelling of 164878279 in words is "one hundred sixty-four million, eight hundred seventy-eight thousand, two hundred seventy-nine".