946609991 has 4 divisors (see below), whose sum is σ = 952639512. Its totient is φ = 940580472.

The previous prime is 946609987. The next prime is 946609999. The reversal of 946609991 is 199906649.

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 946609991 - 2² = 946609987 is a prime.

It is a super-2 number, since 2×946609991² = 1792140950122040162, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (946609999) 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, 3014525 + ... + 3014838.

It is an arithmetic number, because the mean of its divisors is an integer number (238159878).

Almost surely, 2^946609991 is an apocalyptic number.

946609991 is a deficient number, since it is larger than the sum of its proper divisors (6029521).

946609991 is a wasteful number, since it uses less digits than its factorization.

946609991 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6029520.

The product of its (nonzero) digits is 944784, while the sum is 53.

The square root of 946609991 is about 30767.0276594929. The cubic root of 946609991 is about 981.8768665355.

The spelling of 946609991 in words is "nine hundred forty-six million, six hundred nine thousand, nine hundred ninety-one".