493981901 has 4 divisors (see below), whose sum is σ = 564550752. Its totient is φ = 423413052.

The previous prime is 493981897. The next prime is 493981907. The reversal of 493981901 is 109189394.

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 493981901 - 2² = 493981897 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (493981907) 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, 35284415 + ... + 35284428.

It is an arithmetic number, because the mean of its divisors is an integer number (141137688).

Almost surely, 2^493981901 is an apocalyptic number.

It is an amenable number.

493981901 is a deficient number, since it is larger than the sum of its proper divisors (70568851).

493981901 is an equidigital number, since it uses as much as digits as its factorization.

493981901 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 70568850.

The product of its (nonzero) digits is 69984, while the sum is 44.

The square root of 493981901 is about 22225.7036109096. The cubic root of 493981901 is about 790.5032850299.

The spelling of 493981901 in words is "four hundred ninety-three million, nine hundred eighty-one thousand, nine hundred one".