601010991 has 12 divisors (see below), whose sum is σ = 992145232. Its totient is φ = 343434816.

The previous prime is 601010989. The next prime is 601011001. The reversal of 601010991 is 199010106.

It is not a de Polignac number, because 601010991 - 2¹ = 601010989 is a prime.

It is a super-2 number, since 2×601010991² = 722428422605604162, 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 (601010941) 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 11 ways as a sum of consecutive naturals, for example, 4769866 + ... + 4769991.

Almost surely, 2^601010991 is an apocalyptic number.

601010991 is a deficient number, since it is larger than the sum of its proper divisors (391134241).

601010991 is a wasteful number, since it uses less digits than its factorization.

601010991 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9539870 (or 9539867 counting only the distinct ones).

The product of its (nonzero) digits is 486, while the sum is 27.

The square root of 601010991 is about 24515.5255093584. The cubic root of 601010991 is about 843.9061232746.

The spelling of 601010991 in words is "six hundred one million, ten thousand, nine hundred ninety-one".