146169509 has 2 divisors, whose sum is σ = 146169510. Its totient is φ = 146169508.

The previous prime is 146169497. The next prime is 146169511. The reversal of 146169509 is 905961641.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 145564225 + 605284 = 12065^2 + 778^2 .

It is a cyclic number.

It is not a de Polignac number, because 146169509 - 2⁴ = 146169493 is a prime.

It is a super-2 number, since 2×146169509² = 42731050722602162, which contains 22 as substring.

Together with 146169511, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (146169539) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 73084754 + 73084755.

It is an arithmetic number, because the mean of its divisors is an integer number (73084755).

Almost surely, 2^146169509 is an apocalyptic number.

It is an amenable number.

146169509 is a deficient number, since it is larger than the sum of its proper divisors (1).

146169509 is an equidigital number, since it uses as much as digits as its factorization.

146169509 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 58320, while the sum is 41.

The square root of 146169509 is about 12090.0582711582. The cubic root of 146169509 is about 526.7674477773.

The spelling of 146169509 in words is "one hundred forty-six million, one hundred sixty-nine thousand, five hundred nine".