491459747 has 2 divisors, whose sum is σ = 491459748. Its totient is φ = 491459746.

The previous prime is 491459701. The next prime is 491459797. The reversal of 491459747 is 747954194.

It is an a-pointer prime, because the next prime (491459797) can be obtained adding 491459747 to its sum of digits (50).

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 491459747 - 2²⁰ = 490411171 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 491459695 and 491459704.

It is not a weakly prime, because it can be changed into another prime (491459797) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 245729873 + 245729874.

It is an arithmetic number, because the mean of its divisors is an integer number (245729874).

Almost surely, 2^491459747 is an apocalyptic number.

491459747 is a deficient number, since it is larger than the sum of its proper divisors (1).

491459747 is an equidigital number, since it uses as much as digits as its factorization.

491459747 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1270080, while the sum is 50.

The square root of 491459747 is about 22168.8914246969. The cubic root of 491459747 is about 789.1556149254.

The spelling of 491459747 in words is "four hundred ninety-one million, four hundred fifty-nine thousand, seven hundred forty-seven".