991409483 has 2 divisors, whose sum is σ = 991409484. Its totient is φ = 991409482.

The previous prime is 991409477. The next prime is 991409491. The reversal of 991409483 is 384904199.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-991409483 is a prime.

It is not a weakly prime, because it can be changed into another prime (991409183) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 495704741 + 495704742.

It is an arithmetic number, because the mean of its divisors is an integer number (495704742).

Almost surely, 2^991409483 is an apocalyptic number.

991409483 is a deficient number, since it is larger than the sum of its proper divisors (1).

991409483 is an equidigital number, since it uses as much as digits as its factorization.

991409483 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 279936, while the sum is 47.

The square root of 991409483 is about 31486.6556337760. The cubic root of 991409483 is about 997.1282553101.

The spelling of 991409483 in words is "nine hundred ninety-one million, four hundred nine thousand, four hundred eighty-three".