494671621 has 4 divisors (see below), whose sum is σ = 497947744. Its totient is φ = 491395500.

The previous prime is 494671609. The next prime is 494671633. The reversal of 494671621 is 126176494.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is an interprime number because it is at equal distance from previous prime (494671609) and next prime (494671633).

It is a cyclic number.

It is not a de Polignac number, because 494671621 - 2⁷ = 494671493 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 (494671651) 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, 1637835 + ... + 1638136.

It is an arithmetic number, because the mean of its divisors is an integer number (124486936).

Almost surely, 2^494671621 is an apocalyptic number.

It is an amenable number.

494671621 is a deficient number, since it is larger than the sum of its proper divisors (3276123).

494671621 is a wasteful number, since it uses less digits than its factorization.

494671621 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3276122.

The product of its digits is 72576, while the sum is 40.

The square root of 494671621 is about 22241.2144677398. The cubic root of 494671621 is about 790.8710261454.

It can be divided in two parts, 4946 and 71621, that added together give a palindrome (76567).

The spelling of 494671621 in words is "four hundred ninety-four million, six hundred seventy-one thousand, six hundred twenty-one".