164145901 has 2 divisors, whose sum is σ = 164145902. Its totient is φ = 164145900.

The previous prime is 164145893. The next prime is 164145911. The reversal of 164145901 is 109541461.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 160630276 + 3515625 = 12674^2 + 1875^2 .

It is a cyclic number.

It is not a de Polignac number, because 164145901 - 2³ = 164145893 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (164145911) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 82072950 + 82072951.

It is an arithmetic number, because the mean of its divisors is an integer number (82072951).

Almost surely, 2^164145901 is an apocalyptic number.

It is an amenable number.

164145901 is a deficient number, since it is larger than the sum of its proper divisors (1).

164145901 is an equidigital number, since it uses as much as digits as its factorization.

164145901 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4320, while the sum is 31.

The square root of 164145901 is about 12811.9436854835. The cubic root of 164145901 is about 547.5326402703.

The spelling of 164145901 in words is "one hundred sixty-four million, one hundred forty-five thousand, nine hundred one".