164992481 has 2 divisors, whose sum is σ = 164992482. Its totient is φ = 164992480.

The previous prime is 164992417. The next prime is 164992589. The reversal of 164992481 is 184299461.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 133171600 + 31820881 = 11540^2 + 5641^2 .

It is an emirp because it is prime and its reverse (184299461) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 164992481 - 2⁶ = 164992417 is a prime.

It is a super-2 number, since 2×164992481² = 54445037573070722, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (164992411) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 82496240 + 82496241.

It is an arithmetic number, because the mean of its divisors is an integer number (82496241).

Almost surely, 2^164992481 is an apocalyptic number.

It is an amenable number.

164992481 is a deficient number, since it is larger than the sum of its proper divisors (1).

164992481 is an equidigital number, since it uses as much as digits as its factorization.

164992481 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 124416, while the sum is 44.

The square root of 164992481 is about 12844.9398986527. The cubic root of 164992481 is about 548.4723237510.

The spelling of 164992481 in words is "one hundred sixty-four million, nine hundred ninety-two thousand, four hundred eighty-one".