52690809 has 4 divisors (see below), whose sum is σ = 70254416. Its totient is φ = 35127204.

The previous prime is 52690787. The next prime is 52690811. The reversal of 52690809 is 90809625.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 52690809 - 2¹² = 52686713 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (52690829) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8781799 + ... + 8781804.

It is an arithmetic number, because the mean of its divisors is an integer number (17563604).

Almost surely, 2^52690809 is an apocalyptic number.

It is an amenable number.

52690809 is a deficient number, since it is larger than the sum of its proper divisors (17563607).

52690809 is a wasteful number, since it uses less digits than its factorization.

52690809 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17563606.

The product of its (nonzero) digits is 38880, while the sum is 39.

The square root of 52690809 is about 7258.8435029280. The cubic root of 52690809 is about 374.8967039936.

The spelling of 52690809 in words is "fifty-two million, six hundred ninety thousand, eight hundred nine".