3997854247 has 4 divisors (see below), whose sum is σ = 4135711320. Its totient is φ = 3859997176.

The previous prime is 3997854241. The next prime is 3997854269. The reversal of 3997854247 is 7424587993.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 7424587993 = 89 ⋅83422337.

It is a cyclic number.

It is not a de Polignac number, because 3997854247 - 2²⁷ = 3863636519 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 3997854191 and 3997854200.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3997854241) 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 3 ways as a sum of consecutive naturals, for example, 68928493 + ... + 68928550.

It is an arithmetic number, because the mean of its divisors is an integer number (1033927830).

Almost surely, 2^3997854247 is an apocalyptic number.

3997854247 is a deficient number, since it is larger than the sum of its proper divisors (137857073).

3997854247 is a wasteful number, since it uses less digits than its factorization.

3997854247 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 137857072.

The product of its digits is 15240960, while the sum is 58.

The square root of 3997854247 is about 63228.5872608269. The cubic root of 3997854247 is about 1587.1171536501.

The spelling of 3997854247 in words is "three billion, nine hundred ninety-seven million, eight hundred fifty-four thousand, two hundred forty-seven".