492991487 has 2 divisors, whose sum is σ = 492991488. Its totient is φ = 492991486.

The previous prime is 492991469. The next prime is 492991511. The reversal of 492991487 is 784199294.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-492991487 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (492991417) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 246495743 + 246495744.

It is an arithmetic number, because the mean of its divisors is an integer number (246495744).

Almost surely, 2^492991487 is an apocalyptic number.

492991487 is a deficient number, since it is larger than the sum of its proper divisors (1).

492991487 is an equidigital number, since it uses as much as digits as its factorization.

492991487 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1306368, while the sum is 53.

The square root of 492991487 is about 22203.4116072283. The cubic root of 492991487 is about 789.9746223755.

The spelling of 492991487 in words is "four hundred ninety-two million, nine hundred ninety-one thousand, four hundred eighty-seven".