389197691 has 8 divisors (see below), whose sum is σ = 410166480. Its totient is φ = 368277408.

The previous prime is 389197681. The next prime is 389197693. The reversal of 389197691 is 196791983.

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 389197691 - 2²⁶ = 322088827 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (389197693) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4985 + ... + 28341.

It is an arithmetic number, because the mean of its divisors is an integer number (51270810).

Almost surely, 2^389197691 is an apocalyptic number.

389197691 is a deficient number, since it is larger than the sum of its proper divisors (20968789).

389197691 is a wasteful number, since it uses less digits than its factorization.

389197691 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24253.

The product of its digits is 734832, while the sum is 53.

The square root of 389197691 is about 19728.0939525338. The cubic root of 389197691 is about 730.1130062122.

The spelling of 389197691 in words is "three hundred eighty-nine million, one hundred ninety-seven thousand, six hundred ninety-one".