1491330047 has 2 divisors, whose sum is σ = 1491330048. Its totient is φ = 1491330046.

The previous prime is 1491330037. The next prime is 1491330091. The reversal of 1491330047 is 7400331941.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1491330047 - 2⁴ = 1491330031 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1491329995 and 1491330022.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1491330037) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 745665023 + 745665024.

It is an arithmetic number, because the mean of its divisors is an integer number (745665024).

Almost surely, 2^1491330047 is an apocalyptic number.

1491330047 is a deficient number, since it is larger than the sum of its proper divisors (1).

1491330047 is an equidigital number, since it uses as much as digits as its factorization.

1491330047 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 9072, while the sum is 32.

The square root of 1491330047 is about 38617.7426450589. The cubic root of 1491330047 is about 1142.5045088538.

Adding to 1491330047 its reverse (7400331941), we get a palindrome (8891661988).

The spelling of 1491330047 in words is "one billion, four hundred ninety-one million, three hundred thirty thousand, forty-seven".