990478479 has 8 divisors (see below), whose sum is σ = 1320871552. Its totient is φ = 660202200.

The previous prime is 990478477. The next prime is 990478501. The reversal of 990478479 is 974874099.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 990478479 - 2¹ = 990478477 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (990478477) 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 in 7 ways as a sum of consecutive naturals, for example, 6997 + ... + 45054.

It is an arithmetic number, because the mean of its divisors is an integer number (165108944).

Almost surely, 2^990478479 is an apocalyptic number.

990478479 is a deficient number, since it is larger than the sum of its proper divisors (330393073).

990478479 is a wasteful number, since it uses less digits than its factorization.

990478479 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 58397.

The product of its (nonzero) digits is 4572288, while the sum is 57.

The square root of 990478479 is about 31471.8680570442. The cubic root of 990478479 is about 996.8160327787.

The spelling of 990478479 in words is "nine hundred ninety million, four hundred seventy-eight thousand, four hundred seventy-nine".