493669690 has 16 divisors (see below), whose sum is σ = 888945192. Its totient is φ = 197392384.

The previous prime is 493669661. The next prime is 493669691. The reversal of 493669690 is 96966394.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 482373369 + 11296321 = 21963^2 + 3361^2 .

It is a super-2 number, since 2×493669690² = 487419525649392200, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (493669691) 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 7 ways as a sum of consecutive naturals, for example, 23502 + ... + 39238.

Almost surely, 2^493669690 is an apocalyptic number.

493669690 is a deficient number, since it is larger than the sum of its proper divisors (395275502).

493669690 is a wasteful number, since it uses less digits than its factorization.

493669690 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18881.

The product of its (nonzero) digits is 1889568, while the sum is 52.

The square root of 493669690 is about 22218.6788536132. The cubic root of 493669690 is about 790.3367095375.

The spelling of 493669690 in words is "four hundred ninety-three million, six hundred sixty-nine thousand, six hundred ninety".