493365981 has 16 divisors (see below), whose sum is σ = 668053760. Its totient is φ = 323818560.

The previous prime is 493365967. The next prime is 493366051. The reversal of 493365981 is 189563394.

It is not a de Polignac number, because 493365981 - 2⁷ = 493365853 is a prime.

It is a super-2 number, since 2×493365981² = 486819982416184722, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 493365981.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (493365931) 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, 85611 + ... + 91191.

It is an arithmetic number, because the mean of its divisors is an integer number (41753360).

Almost surely, 2^493365981 is an apocalyptic number.

It is an amenable number.

493365981 is a deficient number, since it is larger than the sum of its proper divisors (174687779).

493365981 is a wasteful number, since it uses less digits than its factorization.

493365981 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6036.

The product of its digits is 699840, while the sum is 48.

The square root of 493365981 is about 22211.8432598468. The cubic root of 493365981 is about 790.1746027573.

The spelling of 493365981 in words is "four hundred ninety-three million, three hundred sixty-five thousand, nine hundred eighty-one".