493650781 has 16 divisors (see below), whose sum is σ = 547934464. Its totient is φ = 441785664.

The previous prime is 493650779. The next prime is 493650791. The reversal of 493650781 is 187056394.

It is a cyclic number.

It is not a de Polignac number, because 493650781 - 2¹ = 493650779 is a prime.

It is a super-2 number, since 2×493650781² = 487382187163819922, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (493650791) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 145996 + ... + 149338.

It is an arithmetic number, because the mean of its divisors is an integer number (34245904).

Almost surely, 2^493650781 is an apocalyptic number.

It is an amenable number.

493650781 is a deficient number, since it is larger than the sum of its proper divisors (54283683).

493650781 is a wasteful number, since it uses less digits than its factorization.

493650781 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3700.

The product of its (nonzero) digits is 181440, while the sum is 43.

The square root of 493650781 is about 22218.2533291886. The cubic root of 493650781 is about 790.3266186691.

The spelling of 493650781 in words is "four hundred ninety-three million, six hundred fifty thousand, seven hundred eighty-one".