493021911 has 4 divisors (see below), whose sum is σ = 657362552. Its totient is φ = 328681272.

The previous prime is 493021891. The next prime is 493021943. The reversal of 493021911 is 119120394.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 493021911 - 2¹⁰ = 493020887 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 (493421911) 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, 82170316 + ... + 82170321.

It is an arithmetic number, because the mean of its divisors is an integer number (164340638).

Almost surely, 2^493021911 is an apocalyptic number.

493021911 is a deficient number, since it is larger than the sum of its proper divisors (164340641).

493021911 is a wasteful number, since it uses less digits than its factorization.

493021911 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 164340640.

The product of its (nonzero) digits is 1944, while the sum is 30.

The square root of 493021911 is about 22204.0967165971. The cubic root of 493021911 is about 789.9908726179.

The spelling of 493021911 in words is "four hundred ninety-three million, twenty-one thousand, nine hundred eleven".