146287409 has 2 divisors, whose sum is σ = 146287410. Its totient is φ = 146287408.

The previous prime is 146287399. The next prime is 146287411. The reversal of 146287409 is 904782641.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 115240225 + 31047184 = 10735^2 + 5572^2 .

It is a cyclic number.

It is not a de Polignac number, because 146287409 - 2²⁴ = 129510193 is a prime.

It is a Sophie Germain prime.

Together with 146287411, it forms a pair of twin primes.

It is a Chen prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (146287459) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 73143704 + 73143705.

It is an arithmetic number, because the mean of its divisors is an integer number (73143705).

Almost surely, 2^146287409 is an apocalyptic number.

It is an amenable number.

146287409 is a deficient number, since it is larger than the sum of its proper divisors (1).

146287409 is an equidigital number, since it uses as much as digits as its factorization.

146287409 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 96768, while the sum is 41.

The square root of 146287409 is about 12094.9331953509. The cubic root of 146287409 is about 526.9090395312.

The spelling of 146287409 in words is "one hundred forty-six million, two hundred eighty-seven thousand, four hundred nine".