493731997 has 4 divisors (see below), whose sum is σ = 538616736. Its totient is φ = 448847260.

The previous prime is 493731991. The next prime is 493732013. The reversal of 493731997 is 799137394.

It is a happy number.

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 a cyclic number.

It is not a de Polignac number, because 493731997 - 2¹⁹ = 493207709 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 (493731991) 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, 22442353 + ... + 22442374.

It is an arithmetic number, because the mean of its divisors is an integer number (134654184).

Almost surely, 2^493731997 is an apocalyptic number.

It is an amenable number.

493731997 is a deficient number, since it is larger than the sum of its proper divisors (44884739).

493731997 is a wasteful number, since it uses less digits than its factorization.

493731997 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 44884738.

The product of its digits is 1285956, while the sum is 52.

The square root of 493731997 is about 22220.0809404466. The cubic root of 493731997 is about 790.3699581103.

The spelling of 493731997 in words is "four hundred ninety-three million, seven hundred thirty-one thousand, nine hundred ninety-seven".