389999169 has 24 divisors (see below), whose sum is σ = 654368832. Its totient is φ = 219201120.

The previous prime is 389999101. The next prime is 389999173. The reversal of 389999169 is 961999983.

389999169 is a `hidden beast` number, since 389 + 9 + 99 + 169 = 666.

It is not a de Polignac number, because 389999169 - 2¹⁷ = 389868097 is a prime.

It is a super-2 number, since 2×389999169² = 304198703641381122, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (63).

It is not an unprimeable number, because it can be changed into a prime (389999369) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 46899 + ... + 54584.

It is an arithmetic number, because the mean of its divisors is an integer number (27265368).

Almost surely, 2^389999169 is an apocalyptic number.

It is an amenable number.

389999169 is a deficient number, since it is larger than the sum of its proper divisors (264369663).

389999169 is a wasteful number, since it uses less digits than its factorization.

389999169 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 101557 (or 101554 counting only the distinct ones).

The product of its digits is 8503056, while the sum is 63.

The square root of 389999169 is about 19748.3966184599. The cubic root of 389999169 is about 730.6138384824.

The spelling of 389999169 in words is "three hundred eighty-nine million, nine hundred ninety-nine thousand, one hundred sixty-nine".