164429987 has 2 divisors, whose sum is σ = 164429988. Its totient is φ = 164429986.

The previous prime is 164429977. The next prime is 164429989. The reversal of 164429987 is 789924461.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 164429987 - 2¹⁶ = 164364451 is a prime.

It is a super-3 number, since 3×164429987³ (a number of 26 digits) contains 333 as substring.

Together with 164429989, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (164429989) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 82214993 + 82214994.

It is an arithmetic number, because the mean of its divisors is an integer number (82214994).

Almost surely, 2^164429987 is an apocalyptic number.

164429987 is a deficient number, since it is larger than the sum of its proper divisors (1).

164429987 is an equidigital number, since it uses as much as digits as its factorization.

164429987 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 870912, while the sum is 50.

The square root of 164429987 is about 12823.0256569969. The cubic root of 164429987 is about 547.8483283433.

The spelling of 164429987 in words is "one hundred sixty-four million, four hundred twenty-nine thousand, nine hundred eighty-seven".