508406449 has 4 divisors (see below), whose sum is σ = 508467700. Its totient is φ = 508345200.

The previous prime is 508406447. The next prime is 508406461. The reversal of 508406449 is 944604805.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 944604805 = 5 ⋅188920961.

It can be written as a sum of positive squares in 2 ways, for example, as 277822224 + 230584225 = 16668^2 + 15185^2 .

It is a cyclic number.

It is not a de Polignac number, because 508406449 - 2¹ = 508406447 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (508406443) 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, 15774 + ... + 35575.

It is an arithmetic number, because the mean of its divisors is an integer number (127116925).

Almost surely, 2^508406449 is an apocalyptic number.

It is an amenable number.

508406449 is a deficient number, since it is larger than the sum of its proper divisors (61251).

508406449 is an equidigital number, since it uses as much as digits as its factorization.

508406449 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 61250.

The product of its (nonzero) digits is 138240, while the sum is 40.

The square root of 508406449 is about 22547.8701654946. The cubic root of 508406449 is about 798.1239628991.

The spelling of 508406449 in words is "five hundred eight million, four hundred six thousand, four hundred forty-nine".