4197000991 has 16 divisors (see below), whose sum is σ = 4486204800. Its totient is φ = 3914954208.

The previous prime is 4197000949. The next prime is 4197001001. The reversal of 4197000991 is 1990007914.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 4197000991 - 2²³ = 4188612383 is a prime.

It is a super-2 number, since 2×4197000991² = 35229634636909964162, 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 (4197000911) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 479805 + ... + 488473.

It is an arithmetic number, because the mean of its divisors is an integer number (280387800).

Almost surely, 2^4197000991 is an apocalyptic number.

4197000991 is a deficient number, since it is larger than the sum of its proper divisors (289203809).

4197000991 is a wasteful number, since it uses less digits than its factorization.

4197000991 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9078.

The product of its (nonzero) digits is 20412, while the sum is 40.

The square root of 4197000991 is about 64784.2649954447. The cubic root of 4197000991 is about 1613.0445318043.

The spelling of 4197000991 in words is "four billion, one hundred ninety-seven million, nine hundred ninety-one", and thus it is an aban number.