9961994 has 12 divisors (see below), whose sum is σ = 17382834. Its totient is φ = 4269384.

The previous prime is 9961981. The next prime is 9962003. The reversal of 9961994 is 4991699.

It can be written as a sum of positive squares in only one way, i.e., 5697769 + 4264225 = 2387^2 + 2065^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 50729 + ... + 50924.

Almost surely, 2^9961994 is an apocalyptic number.

9961994 is a deficient number, since it is larger than the sum of its proper divisors (7420840).

9961994 is a wasteful number, since it uses less digits than its factorization.

9961994 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 101669 (or 101662 counting only the distinct ones).

The product of its digits is 157464, while the sum is 47.

The square root of 9961994 is about 3156.2626633409. The cubic root of 9961994 is about 215.1701843456.

The spelling of 9961994 in words is "nine million, nine hundred sixty-one thousand, nine hundred ninety-four".