949918661 has 4 divisors (see below), whose sum is σ = 999914400. Its totient is φ = 899922924.

The previous prime is 949918643. The next prime is 949918679. The reversal of 949918661 is 166819949.

It is a happy number.

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.

It is an interprime number because it is at equal distance from previous prime (949918643) and next prime (949918679).

It is a cyclic number.

It is not a de Polignac number, because 949918661 - 2²² = 945724357 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (949918601) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 24997841 + ... + 24997878.

It is an arithmetic number, because the mean of its divisors is an integer number (249978600).

Almost surely, 2^949918661 is an apocalyptic number.

It is an amenable number.

949918661 is a deficient number, since it is larger than the sum of its proper divisors (49995739).

949918661 is a wasteful number, since it uses less digits than its factorization.

949918661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 49995738.

The product of its digits is 839808, while the sum is 53.

The square root of 949918661 is about 30820.7504937826. The cubic root of 949918661 is about 983.0195155131.

The spelling of 949918661 in words is "nine hundred forty-nine million, nine hundred eighteen thousand, six hundred sixty-one".