3998697747 has 8 divisors (see below), whose sum is σ = 5816287680. Its totient is φ = 2423453160.

The previous prime is 3998697701. The next prime is 3998697757. The reversal of 3998697747 is 7477968993.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 3998697747 - 2⁸ = 3998697491 is a prime.

It is not an unprimeable number, because it can be changed into a prime (3998697757) 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 7 ways as a sum of consecutive naturals, for example, 60586297 + ... + 60586362.

It is an arithmetic number, because the mean of its divisors is an integer number (727035960).

Almost surely, 2^3998697747 is an apocalyptic number.

3998697747 is a deficient number, since it is larger than the sum of its proper divisors (1817589933).

3998697747 is a wasteful number, since it uses less digits than its factorization.

3998697747 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 121172673.

The product of its digits is 144027072, while the sum is 69.

The square root of 3998697747 is about 63235.2571513709. The cubic root of 3998697747 is about 1587.2287667884.

The spelling of 3998697747 in words is "three billion, nine hundred ninety-eight million, six hundred ninety-seven thousand, seven hundred forty-seven".