389209157 has 8 divisors (see below), whose sum is σ = 398576376. Its totient is φ = 379916992.

The previous prime is 389209147. The next prime is 389209159. The reversal of 389209157 is 751902983.

It can be written as a sum of positive squares in 4 ways, for example, as 74891716 + 314317441 = 8654^2 + 17729^2 .

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 389209157 - 2⁴ = 389209141 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (389209159) 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, 8198 + ... + 29079.

It is an arithmetic number, because the mean of its divisors is an integer number (49822047).

Almost surely, 2^389209157 is an apocalyptic number.

It is an amenable number.

389209157 is a deficient number, since it is larger than the sum of its proper divisors (9367219).

389209157 is a wasteful number, since it uses less digits than its factorization.

389209157 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 37527.

The product of its (nonzero) digits is 136080, while the sum is 44.

The square root of 389209157 is about 19728.3845511993. The cubic root of 389209157 is about 730.1201759991.

The spelling of 389209157 in words is "three hundred eighty-nine million, two hundred nine thousand, one hundred fifty-seven".