990906463 has 2 divisors, whose sum is σ = 990906464. Its totient is φ = 990906462.

The previous prime is 990906403. The next prime is 990906467. The reversal of 990906463 is 364609099.

It is a strong prime.

It is an emirp because it is prime and its reverse (364609099) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 990906463 - 2¹⁷ = 990775391 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (990906467) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 495453231 + 495453232.

It is an arithmetic number, because the mean of its divisors is an integer number (495453232).

Almost surely, 2^990906463 is an apocalyptic number.

990906463 is a deficient number, since it is larger than the sum of its proper divisors (1).

990906463 is an equidigital number, since it uses as much as digits as its factorization.

990906463 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 314928, while the sum is 46.

The square root of 990906463 is about 31478.6667919720. Note that the first 3 decimals coincide. The cubic root of 990906463 is about 996.9595862529.

The spelling of 990906463 in words is "nine hundred ninety million, nine hundred six thousand, four hundred sixty-three".