390169 has 4 divisors (see below), whose sum is σ = 420196. Its totient is φ = 360144.

The previous prime is 390161. The next prime is 390191. The reversal of 390169 is 961093.

It is a happy number.

390169 is nontrivially palindromic in base 12.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 15625 + 374544 = 125^2 + 612^2 .

It is a cyclic number.

It is not a de Polignac number, because 390169 - 2³ = 390161 is a prime.

It is a super-2 number, since 2×390169² = 304463697122, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (390161) 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, 14994 + ... + 15019.

It is an arithmetic number, because the mean of its divisors is an integer number (105049).

2³⁹⁰¹⁶⁹ is an apocalyptic number.

It is an amenable number.

390169 is a deficient number, since it is larger than the sum of its proper divisors (30027).

390169 is a wasteful number, since it uses less digits than its factorization.

390169 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30026.

The product of its (nonzero) digits is 1458, while the sum is 28.

The square root of 390169 is about 624.6350934746. The cubic root of 390169 is about 73.0719875351.

The spelling of 390169 in words is "three hundred ninety thousand, one hundred sixty-nine".