509561002 has 4 divisors (see below), whose sum is σ = 764341506. Its totient is φ = 254780500.

The previous prime is 509560973. The next prime is 509561011. The reversal of 509561002 is 200165905.

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., 421932681 + 87628321 = 20541^2 + 9361^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 127390249 + ... + 127390252.

Almost surely, 2^509561002 is an apocalyptic number.

509561002 is a deficient number, since it is larger than the sum of its proper divisors (254780504).

509561002 is a wasteful number, since it uses less digits than its factorization.

509561002 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 254780503.

The product of its (nonzero) digits is 2700, while the sum is 28.

The square root of 509561002 is about 22573.4579096779. The cubic root of 509561002 is about 798.7276660724.

The spelling of 509561002 in words is "five hundred nine million, five hundred sixty-one thousand, two".