389106691 has 4 divisors (see below), whose sum is σ = 389194632. Its totient is φ = 389018752.

The previous prime is 389106671. The next prime is 389106703. The reversal of 389106691 is 196601983.

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 389106691 - 2¹¹ = 389104643 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (389106611) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 36961 + ... + 46306.

It is an arithmetic number, because the mean of its divisors is an integer number (97298658).

Almost surely, 2^389106691 is an apocalyptic number.

389106691 is a deficient number, since it is larger than the sum of its proper divisors (87941).

389106691 is an equidigital number, since it uses as much as digits as its factorization.

389106691 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 87940.

The product of its (nonzero) digits is 69984, while the sum is 43.

The square root of 389106691 is about 19725.7874621015. The cubic root of 389106691 is about 730.0560981472.

The spelling of 389106691 in words is "three hundred eighty-nine million, one hundred six thousand, six hundred ninety-one".