164252987 has 2 divisors, whose sum is σ = 164252988. Its totient is φ = 164252986.

The previous prime is 164252983. The next prime is 164253007. The reversal of 164252987 is 789252461.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 164252987 - 2² = 164252983 is a prime.

It is not a weakly prime, because it can be changed into another prime (164252983) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 82126493 + 82126494.

It is an arithmetic number, because the mean of its divisors is an integer number (82126494).

Almost surely, 2^164252987 is an apocalyptic number.

164252987 is a deficient number, since it is larger than the sum of its proper divisors (1).

164252987 is an equidigital number, since it uses as much as digits as its factorization.

164252987 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 241920, while the sum is 44.

The square root of 164252987 is about 12816.1221514154. The cubic root of 164252987 is about 547.6516813879.

The spelling of 164252987 in words is "one hundred sixty-four million, two hundred fifty-two thousand, nine hundred eighty-seven".