9977994 has 24 divisors (see below), whose sum is σ = 23282532. Its totient is φ = 3070080.

The previous prime is 9977993. The next prime is 9977999. The reversal of 9977994 is 4997799.

It can be written as a sum of positive squares in 2 ways, for example, as 9828225 + 149769 = 3135^2 + 387^2 .

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 9977994.

It is not an unprimeable number, because it can be changed into a prime (9977993) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 21087 + ... + 21554.

Almost surely, 2^9977994 is an apocalyptic number.

9977994 is an abundant number, since it is smaller than the sum of its proper divisors (13304538).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

9977994 is a wasteful number, since it uses less digits than its factorization.

9977994 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42662 (or 42659 counting only the distinct ones).

The product of its digits is 1285956, while the sum is 54.

The square root of 9977994 is about 3158.7962897281. The cubic root of 9977994 is about 215.2853179714.

The spelling of 9977994 in words is "nine million, nine hundred seventy-seven thousand, nine hundred ninety-four".