509464906 has 4 divisors (see below), whose sum is σ = 764197362. Its totient is φ = 254732452.

The previous prime is 509464889. The next prime is 509464909. The reversal of 509464906 is 609464905.

It is a happy number.

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

It can be written as a sum of positive squares in only one way, i.e., 488807881 + 20657025 = 22109^2 + 4545^2 .

It is not an unprimeable number, because it can be changed into a prime (509464909) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 127366225 + ... + 127366228.

Almost surely, 2^509464906 is an apocalyptic number.

509464906 is a deficient number, since it is larger than the sum of its proper divisors (254732456).

509464906 is a wasteful number, since it uses less digits than its factorization.

509464906 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 254732455.

The product of its (nonzero) digits is 233280, while the sum is 43.

The square root of 509464906 is about 22571.3292918251. The cubic root of 509464906 is about 798.6774533344.

Subtracting 509464906 from its reverse (609464905), we obtain a palindrome (99999999).

The spelling of 509464906 in words is "five hundred nine million, four hundred sixty-four thousand, nine hundred six".