52840009 has 2 divisors, whose sum is σ = 52840010. Its totient is φ = 52840008.

The previous prime is 52839989. The next prime is 52840031. The reversal of 52840009 is 90004825.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 37785609 + 15054400 = 6147^2 + 3880^2 .

It is a cyclic number.

It is not a de Polignac number, because 52840009 - 2⁷ = 52839881 is a prime.

It is a super-2 number, since 2×52840009² = 5584133102240162, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (52847009) 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, 26420004 + 26420005.

It is an arithmetic number, because the mean of its divisors is an integer number (26420005).

Almost surely, 2^52840009 is an apocalyptic number.

It is an amenable number.

52840009 is a deficient number, since it is larger than the sum of its proper divisors (1).

52840009 is an equidigital number, since it uses as much as digits as its factorization.

52840009 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2880, while the sum is 28.

The square root of 52840009 is about 7269.1133572121. The cubic root of 52840009 is about 375.2502247002.

The spelling of 52840009 in words is "fifty-two million, eight hundred forty thousand, nine".