990839306 has 4 divisors (see below), whose sum is σ = 1486258962. Its totient is φ = 495419652.

The previous prime is 990839299. The next prime is 990839387. The reversal of 990839306 is 603938099.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 603938099 = 19687 ⋅30677.

It can be written as a sum of positive squares in only one way, i.e., 496888681 + 493950625 = 22291^2 + 22225^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 247709825 + ... + 247709828.

Almost surely, 2^990839306 is an apocalyptic number.

990839306 is a deficient number, since it is larger than the sum of its proper divisors (495419656).

990839306 is a wasteful number, since it uses less digits than its factorization.

990839306 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 495419655.

The product of its (nonzero) digits is 314928, while the sum is 47.

The square root of 990839306 is about 31477.6000673495. The cubic root of 990839306 is about 996.9370633307.

The spelling of 990839306 in words is "nine hundred ninety million, eight hundred thirty-nine thousand, three hundred six".