9939890601 has 27 divisors (see below), whose sum is σ = 14517056541. Its totient is φ = 6553813464.

The previous prime is 9939890591. The next prime is 9939890617. The reversal of 9939890601 is 1060989399.

The square root of 9939890601 is 99699.

It is a perfect power (a square), and thus also a powerful number.

It is not a de Polignac number, because 9939890601 - 2¹⁵ = 9939857833 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (9939840601) by changing a digit.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 49949100 + ... + 49949298.

Almost surely, 2^9939890601 is an apocalyptic number.

9939890601 is the 99699-th square number.

9939890601 is the 49850-th centered octagonal number.

It is an amenable number.

9939890601 is a deficient number, since it is larger than the sum of its proper divisors (4577165940).

9939890601 is an equidigital number, since it uses as much as digits as its factorization.

9939890601 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 738 (or 369 counting only the distinct ones).

The product of its (nonzero) digits is 944784, while the sum is 54.

The cubic root of 9939890601 is about 2150.1092860259.

The spelling of 9939890601 in words is "nine billion, nine hundred thirty-nine million, eight hundred ninety thousand, six hundred one".