494032991 has 4 divisors (see below), whose sum is σ = 507385272. Its totient is φ = 480680712.

The previous prime is 494032967. The next prime is 494033021. The reversal of 494032991 is 199230494.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 199230494 = 2 ⋅99615247.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-494032991 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 (494032691) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6676085 + ... + 6676158.

It is an arithmetic number, because the mean of its divisors is an integer number (126846318).

Almost surely, 2^494032991 is an apocalyptic number.

494032991 is a deficient number, since it is larger than the sum of its proper divisors (13352281).

494032991 is a wasteful number, since it uses less digits than its factorization.

494032991 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13352280.

The product of its (nonzero) digits is 69984, while the sum is 41.

The square root of 494032991 is about 22226.8529261342. The cubic root of 494032991 is about 790.5305366495.

The spelling of 494032991 in words is "four hundred ninety-four million, thirty-two thousand, nine hundred ninety-one".