4181998997 has 16 divisors (see below), whose sum is σ = 4835376000. Its totient is φ = 3574602240.

The previous prime is 4181998991. The next prime is 4181999011. The reversal of 4181998997 is 7998991814.

It is not a de Polignac number, because 4181998997 - 2²⁶ = 4114890133 is a prime.

It is a super-2 number, since 2×4181998997² = 34978231221818012018, 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 (4181998991) 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 15 ways as a sum of consecutive naturals, for example, 185504 + ... + 206822.

It is an arithmetic number, because the mean of its divisors is an integer number (302211000).

Almost surely, 2^4181998997 is an apocalyptic number.

It is an amenable number.

4181998997 is a deficient number, since it is larger than the sum of its proper divisors (653377003).

4181998997 is a wasteful number, since it uses less digits than its factorization.

4181998997 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22396.

The product of its digits is 11757312, while the sum is 65.

The square root of 4181998997 is about 64668.3771019499. The cubic root of 4181998997 is about 1611.1203185827.

The spelling of 4181998997 in words is "four billion, one hundred eighty-one million, nine hundred ninety-eight thousand, nine hundred ninety-seven".