491453487 has 90 divisors (see below), whose sum is σ = 903948408. Its totient is φ = 266050008.

The previous prime is 491453483. The next prime is 491453513. The reversal of 491453487 is 784354194.

It is a powerful number, because all its prime factors have an exponent greater than 1 and also an Achilles number because it is not a perfect power.

It is not a de Polignac number, because 491453487 - 2² = 491453483 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (491453483) by changing a digit.

It is a polite number, since it can be written in 89 ways as a sum of consecutive naturals, for example, 25865964 + ... + 25865982.

Almost surely, 2^491453487 is an apocalyptic number.

491453487 is a deficient number, since it is larger than the sum of its proper divisors (412494921).

491453487 is an frugal number, since it uses more digits than its factorization.

491453487 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 85 (or 29 counting only the distinct ones).

The product of its digits is 483840, while the sum is 45.

The square root of 491453487 is about 22168.7502354102. The cubic root of 491453487 is about 789.1522642711.

The spelling of 491453487 in words is "four hundred ninety-one million, four hundred fifty-three thousand, four hundred eighty-seven".