146022509 has 2 divisors, whose sum is σ = 146022510. Its totient is φ = 146022508.

The previous prime is 146022497. The next prime is 146022521. The reversal of 146022509 is 905220641.

It is a happy number.

It is a balanced prime because it is at equal distance from previous prime (146022497) and next prime (146022521).

It can be written as a sum of positive squares in only one way, i.e., 129846025 + 16176484 = 11395^2 + 4022^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-146022509 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (146022209) 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, 73011254 + 73011255.

It is an arithmetic number, because the mean of its divisors is an integer number (73011255).

Almost surely, 2^146022509 is an apocalyptic number.

It is an amenable number.

146022509 is a deficient number, since it is larger than the sum of its proper divisors (1).

146022509 is an equidigital number, since it uses as much as digits as its factorization.

146022509 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 29.

The square root of 146022509 is about 12083.9773667448. The cubic root of 146022509 is about 526.5908017538.

The spelling of 146022509 in words is "one hundred forty-six million, twenty-two thousand, five hundred nine".