490036621 has 4 divisors (see below), whose sum is σ = 503280892. Its totient is φ = 476792352.

The previous prime is 490036609. The next prime is 490036637. The reversal of 490036621 is 126630094.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 126630094 = 2 ⋅63315047.

It can be written as a sum of positive squares in 2 ways, for example, as 411075625 + 78960996 = 20275^2 + 8886^2 .

It is a cyclic number.

It is not a de Polignac number, because 490036621 - 2⁹ = 490036109 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (490036661) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6622080 + ... + 6622153.

It is an arithmetic number, because the mean of its divisors is an integer number (125820223).

Almost surely, 2^490036621 is an apocalyptic number.

It is an amenable number.

490036621 is a deficient number, since it is larger than the sum of its proper divisors (13244271).

490036621 is a wasteful number, since it uses less digits than its factorization.

490036621 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13244270.

The product of its (nonzero) digits is 7776, while the sum is 31.

The square root of 490036621 is about 22136.7707897968. The cubic root of 490036621 is about 788.3931559754.

The spelling of 490036621 in words is "four hundred ninety million, thirty-six thousand, six hundred twenty-one".