491308093 has 4 divisors (see below), whose sum is σ = 493044448. Its totient is φ = 489571740.

The previous prime is 491308079. The next prime is 491308117. The reversal of 491308093 is 390803194.

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 491308093 - 2¹³ = 491299901 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 (491308073) 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, 867753 + ... + 868318.

It is an arithmetic number, because the mean of its divisors is an integer number (123261112).

Almost surely, 2^491308093 is an apocalyptic number.

It is an amenable number.

491308093 is a deficient number, since it is larger than the sum of its proper divisors (1736355).

491308093 is a wasteful number, since it uses less digits than its factorization.

491308093 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1736354.

The product of its (nonzero) digits is 23328, while the sum is 37.

The square root of 491308093 is about 22165.4707371623. The cubic root of 491308093 is about 789.0744343753.

The spelling of 491308093 in words is "four hundred ninety-one million, three hundred eight thousand, ninety-three".