164642479 has 2 divisors, whose sum is σ = 164642480. Its totient is φ = 164642478.

The previous prime is 164642473. The next prime is 164642531. The reversal of 164642479 is 974246461.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 164642479 - 2¹¹ = 164640431 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (164642473) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 82321239 + 82321240.

It is an arithmetic number, because the mean of its divisors is an integer number (82321240).

Almost surely, 2^164642479 is an apocalyptic number.

164642479 is a deficient number, since it is larger than the sum of its proper divisors (1).

164642479 is an equidigital number, since it uses as much as digits as its factorization.

164642479 is an evil number, because the sum of its binary digits is even.

The product of its digits is 290304, while the sum is 43.

The square root of 164642479 is about 12831.3085458966. The cubic root of 164642479 is about 548.0842205880.

The spelling of 164642479 in words is "one hundred sixty-four million, six hundred forty-two thousand, four hundred seventy-nine".