494639153 has 4 divisors (see below), whose sum is σ = 497372148. Its totient is φ = 491906160.

The previous prime is 494639149. The next prime is 494639161. The reversal of 494639153 is 351936494.

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

It can be written as a sum of positive squares in 2 ways, for example, as 165688384 + 328950769 = 12872^2 + 18137^2 .

It is a cyclic number.

It is not a de Polignac number, because 494639153 - 2² = 494639149 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (494639183) 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, 1366226 + ... + 1366587.

It is an arithmetic number, because the mean of its divisors is an integer number (124343037).

Almost surely, 2^494639153 is an apocalyptic number.

It is an amenable number.

494639153 is a deficient number, since it is larger than the sum of its proper divisors (2732995).

494639153 is a wasteful number, since it uses less digits than its factorization.

494639153 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2732994.

The product of its digits is 349920, while the sum is 44.

The square root of 494639153 is about 22240.4845495776. The cubic root of 494639153 is about 790.8537227053.

The spelling of 494639153 in words is "four hundred ninety-four million, six hundred thirty-nine thousand, one hundred fifty-three".