994661 has 4 divisors (see below), whose sum is σ = 1015872. Its totient is φ = 973452.

The previous prime is 994657. The next prime is 994663. The reversal of 994661 is 166499.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 166499 = 167 ⋅997.

It is a cyclic number.

It is not a de Polignac number, because 994661 - 2² = 994657 is a prime.

It is a Duffinian number.

It is a plaindrome in base 15.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (994663) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10535 + ... + 10628.

It is an arithmetic number, because the mean of its divisors is an integer number (253968).

2⁹⁹⁴⁶⁶¹ is an apocalyptic number.

It is an amenable number.

994661 is a deficient number, since it is larger than the sum of its proper divisors (21211).

994661 is a wasteful number, since it uses less digits than its factorization.

994661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21210.

The product of its digits is 11664, while the sum is 35.

The square root of 994661 is about 997.3269273413. The cubic root of 994661 is about 99.8217156692.

The spelling of 994661 in words is "nine hundred ninety-four thousand, six hundred sixty-one".