491977467 has 12 divisors (see below), whose sum is σ = 752436360. Its totient is φ = 308691648.

The previous prime is 491977463. The next prime is 491977481. The reversal of 491977467 is 764779194.

491977467 is a `hidden beast` number, since 4 + 91 + 97 + 7 + 467 = 666.

It is not a de Polignac number, because 491977467 - 2² = 491977463 is a prime.

It is not an unprimeable number, because it can be changed into a prime (491977463) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1607617 + ... + 1607922.

It is an arithmetic number, because the mean of its divisors is an integer number (62703030).

Almost surely, 2^491977467 is an apocalyptic number.

491977467 is a deficient number, since it is larger than the sum of its proper divisors (260458893).

491977467 is a wasteful number, since it uses less digits than its factorization.

491977467 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3215562 (or 3215559 counting only the distinct ones).

The product of its digits is 2667168, while the sum is 54.

The square root of 491977467 is about 22180.5650739561. The cubic root of 491977467 is about 789.4326252450.

The spelling of 491977467 in words is "four hundred ninety-one million, nine hundred seventy-seven thousand, four hundred sixty-seven".