3997240780309 has 8 divisors (see below), whose sum is σ = 4585132283648. Its totient is φ = 3413563553520.

The previous prime is 3997240780279. The next prime is 3997240780327. The reversal of 3997240780309 is 9030870427993.

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

It is a cyclic number.

It is not a de Polignac number, because 3997240780309 - 2⁵ = 3997240780277 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3997240780909) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1053567102 + ... + 1053570895.

It is an arithmetic number, because the mean of its divisors is an integer number (573141535456).

Almost surely, 2^{3997240780309} is an apocalyptic number.

It is an amenable number.

3997240780309 is a deficient number, since it is larger than the sum of its proper divisors (587891503339).

3997240780309 is a wasteful number, since it uses less digits than its factorization.

3997240780309 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2107138275.

The product of its (nonzero) digits is 20575296, while the sum is 61.

The spelling of 3997240780309 in words is "three trillion, nine hundred ninety-seven billion, two hundred forty million, seven hundred eighty thousand, three hundred nine".