946899991 has 4 divisors (see below), whose sum is σ = 977445184. Its totient is φ = 916354800.

The previous prime is 946899977. The next prime is 946900001. The reversal of 946899991 is 199998649.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 946899991 - 2⁵ = 946899959 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 (946899901) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 15272550 + ... + 15272611.

It is an arithmetic number, because the mean of its divisors is an integer number (244361296).

Almost surely, 2^946899991 is an apocalyptic number.

946899991 is a deficient number, since it is larger than the sum of its proper divisors (30545193).

946899991 is a wasteful number, since it uses less digits than its factorization.

946899991 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30545192.

The product of its digits is 11337408, while the sum is 64.

The square root of 946899991 is about 30771.7401360404. The cubic root of 946899991 is about 981.9771243753.

The spelling of 946899991 in words is "nine hundred forty-six million, eight hundred ninety-nine thousand, nine hundred ninety-one".