389851976697 has 4 divisors (see below), whose sum is σ = 519802635600. Its totient is φ = 259901317796.

The previous prime is 389851976693. The next prime is 389851976711. The reversal of 389851976697 is 796679158983.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 389851976697 - 2² = 389851976693 is a prime.

It is not an unprimeable number, because it can be changed into a prime (389851976693) 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, 64975329447 + ... + 64975329452.

It is an arithmetic number, because the mean of its divisors is an integer number (129950658900).

Almost surely, 2^389851976697 is an apocalyptic number.

It is an amenable number.

389851976697 is a deficient number, since it is larger than the sum of its proper divisors (129950658903).

389851976697 is a wasteful number, since it uses less digits than its factorization.

389851976697 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 129950658902.

The product of its digits is 1234517760, while the sum is 78.

The spelling of 389851976697 in words is "three hundred eighty-nine billion, eight hundred fifty-one million, nine hundred seventy-six thousand, six hundred ninety-seven".