491915337 has 4 divisors (see below), whose sum is σ = 655887120. Its totient is φ = 327943556.

The previous prime is 491915327. The next prime is 491915357. The reversal of 491915337 is 733519194.

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 491915337 - 2⁴ = 491915321 is a prime.

It is not an unprimeable number, because it can be changed into a prime (491915317) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 81985887 + ... + 81985892.

It is an arithmetic number, because the mean of its divisors is an integer number (163971780).

Almost surely, 2^491915337 is an apocalyptic number.

It is an amenable number.

491915337 is a deficient number, since it is larger than the sum of its proper divisors (163971783).

491915337 is a wasteful number, since it uses less digits than its factorization.

491915337 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 163971782.

The product of its digits is 102060, while the sum is 42.

The square root of 491915337 is about 22179.1644793035. The cubic root of 491915337 is about 789.3993923450.

The spelling of 491915337 in words is "four hundred ninety-one million, nine hundred fifteen thousand, three hundred thirty-seven".