3975249647 has 4 divisors (see below), whose sum is σ = 4040417736. Its totient is φ = 3910081560.

The previous prime is 3975249631. The next prime is 3975249653. The reversal of 3975249647 is 7469425793.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 3975249647 - 2⁴ = 3975249631 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 3975249592 and 3975249601.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3975249547) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 32583953 + ... + 32584074.

It is an arithmetic number, because the mean of its divisors is an integer number (1010104434).

Almost surely, 2^3975249647 is an apocalyptic number.

3975249647 is a deficient number, since it is larger than the sum of its proper divisors (65168089).

3975249647 is an equidigital number, since it uses as much as digits as its factorization.

3975249647 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 65168088.

The product of its digits is 11430720, while the sum is 56.

The square root of 3975249647 is about 63049.5808630002. The cubic root of 3975249647 is about 1584.1202144452.

The spelling of 3975249647 in words is "three billion, nine hundred seventy-five million, two hundred forty-nine thousand, six hundred forty-seven".