990379647 has 6 divisors (see below), whose sum is σ = 1430548392. Its totient is φ = 660253092.

The previous prime is 990379627. The next prime is 990379651. The reversal of 990379647 is 746973099.

It is not a de Polignac number, because 990379647 - 2⁶ = 990379583 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 990379593 and 990379602.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (990379627) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 55021083 + ... + 55021100.

It is an arithmetic number, because the mean of its divisors is an integer number (238424732).

Almost surely, 2^990379647 is an apocalyptic number.

990379647 is a deficient number, since it is larger than the sum of its proper divisors (440168745).

990379647 is a wasteful number, since it uses less digits than its factorization.

990379647 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 110042189 (or 110042186 counting only the distinct ones).

The product of its (nonzero) digits is 2571912, while the sum is 54.

The square root of 990379647 is about 31470.2978536905. The cubic root of 990379647 is about 996.7828768845.

The spelling of 990379647 in words is "nine hundred ninety million, three hundred seventy-nine thousand, six hundred forty-seven".