946644991 has 2 divisors, whose sum is σ = 946644992. Its totient is φ = 946644990.

The previous prime is 946644977. The next prime is 946644997. The reversal of 946644991 is 199446649.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 946644991 - 2⁷ = 946644863 is a prime.

It is a super-2 number, since 2×946644991² = 1792273477970780162, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (946644997) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 473322495 + 473322496.

It is an arithmetic number, because the mean of its divisors is an integer number (473322496).

Almost surely, 2^946644991 is an apocalyptic number.

946644991 is a deficient number, since it is larger than the sum of its proper divisors (1).

946644991 is an equidigital number, since it uses as much as digits as its factorization.

946644991 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1679616, while the sum is 52.

The square root of 946644991 is about 30767.5964449614. The cubic root of 946644991 is about 981.8889677061. Note that the first 3 decimals are identical.

The spelling of 946644991 in words is "nine hundred forty-six million, six hundred forty-four thousand, nine hundred ninety-one".