520069906 has 4 divisors (see below), whose sum is σ = 780104862. Its totient is φ = 260034952.

The previous prime is 520069903. The next prime is 520069909. The reversal of 520069906 is 609960025.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is an interprime number because it is at equal distance from previous prime (520069903) and next prime (520069909).

It can be written as a sum of positive squares in only one way, i.e., 516425625 + 3644281 = 22725^2 + 1909^2 .

It is not an unprimeable number, because it can be changed into a prime (520069903) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 130017475 + ... + 130017478.

Almost surely, 2^520069906 is an apocalyptic number.

520069906 is a deficient number, since it is larger than the sum of its proper divisors (260034956).

520069906 is a wasteful number, since it uses less digits than its factorization.

520069906 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 260034955.

The product of its (nonzero) digits is 29160, while the sum is 37.

The square root of 520069906 is about 22805.0412409186. The cubic root of 520069906 is about 804.1811850845.

The spelling of 520069906 in words is "five hundred twenty million, sixty-nine thousand, nine hundred six".