52668409 has 2 divisors, whose sum is σ = 52668410. Its totient is φ = 52668408.

The previous prime is 52668403. The next prime is 52668443. The reversal of 52668409 is 90486625.

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., 50197225 + 2471184 = 7085^2 + 1572^2 .

It is a cyclic number.

It is not a de Polignac number, because 52668409 - 2¹⁵ = 52635641 is a prime.

It is a super-2 number, since 2×52668409² = 5547922613182562, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (52668403) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 26334204 + 26334205.

It is an arithmetic number, because the mean of its divisors is an integer number (26334205).

Almost surely, 2^52668409 is an apocalyptic number.

It is an amenable number.

52668409 is a deficient number, since it is larger than the sum of its proper divisors (1).

52668409 is an equidigital number, since it uses as much as digits as its factorization.

52668409 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 103680, while the sum is 40.

The square root of 52668409 is about 7257.3003933970. The cubic root of 52668409 is about 374.8435709037.

The spelling of 52668409 in words is "fifty-two million, six hundred sixty-eight thousand, four hundred nine".