164977387 has 2 divisors, whose sum is σ = 164977388. Its totient is φ = 164977386.

The previous prime is 164977363. The next prime is 164977441. The reversal of 164977387 is 783779461.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 164977387 - 2¹¹ = 164975339 is a prime.

It is not a weakly prime, because it can be changed into another prime (164987387) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 82488693 + 82488694.

It is an arithmetic number, because the mean of its divisors is an integer number (82488694).

Almost surely, 2^164977387 is an apocalyptic number.

164977387 is a deficient number, since it is larger than the sum of its proper divisors (1).

164977387 is an equidigital number, since it uses as much as digits as its factorization.

164977387 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1778112, while the sum is 52.

The square root of 164977387 is about 12844.3523386740. The cubic root of 164977387 is about 548.4555979509.

The spelling of 164977387 in words is "one hundred sixty-four million, nine hundred seventy-seven thousand, three hundred eighty-seven".