1491327983 has 2 divisors, whose sum is σ = 1491327984. Its totient is φ = 1491327982.

The previous prime is 1491327919. The next prime is 1491327997. The reversal of 1491327983 is 3897231941.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1491327983 - 2⁶ = 1491327919 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1491327683) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 745663991 + 745663992.

It is an arithmetic number, because the mean of its divisors is an integer number (745663992).

Almost surely, 2^1491327983 is an apocalyptic number.

1491327983 is a deficient number, since it is larger than the sum of its proper divisors (1).

1491327983 is an equidigital number, since it uses as much as digits as its factorization.

1491327983 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 326592, while the sum is 47.

The square root of 1491327983 is about 38617.7159215819. The cubic root of 1491327983 is about 1142.5039817784.

The spelling of 1491327983 in words is "one billion, four hundred ninety-one million, three hundred twenty-seven thousand, nine hundred eighty-three".