164872387 has 2 divisors, whose sum is σ = 164872388. Its totient is φ = 164872386.

The previous prime is 164872369. The next prime is 164872391. The reversal of 164872387 is 783278461.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 164872387 - 2¹¹ = 164870339 is a prime.

It is not a weakly prime, because it can be changed into another prime (164872087) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 82436193 + 82436194.

It is an arithmetic number, because the mean of its divisors is an integer number (82436194).

Almost surely, 2^164872387 is an apocalyptic number.

164872387 is a deficient number, since it is larger than the sum of its proper divisors (1).

164872387 is an equidigital number, since it uses as much as digits as its factorization.

164872387 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 451584, while the sum is 46.

The square root of 164872387 is about 12840.2642885573. The cubic root of 164872387 is about 548.3392182450.

The spelling of 164872387 in words is "one hundred sixty-four million, eight hundred seventy-two thousand, three hundred eighty-seven".