289670381 has 16 divisors (see below), whose sum is σ = 388929408. Its totient is φ = 208353600.

The previous prime is 289670369. The next prime is 289670393. The reversal of 289670381 is 183076982.

It is an interprime number because it is at equal distance from previous prime (289670369) and next prime (289670393).

It is not a de Polignac number, because 289670381 - 2¹⁸ = 289408237 is a prime.

It is a super-2 number, since 2×289670381² = 167817859257370322, which contains 22 as substring.

It is a Smith number, since the sum of its digits (44) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (289670321) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 143690 + ... + 145691.

It is an arithmetic number, because the mean of its divisors is an integer number (24308088).

Almost surely, 2^289670381 is an apocalyptic number.

It is an amenable number.

289670381 is a deficient number, since it is larger than the sum of its proper divisors (99259027).

289670381 is a wasteful number, since it uses less digits than its factorization.

289670381 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 289412.

The product of its (nonzero) digits is 145152, while the sum is 44.

The square root of 289670381 is about 17019.7056672552. The cubic root of 289670381 is about 661.6597200643.

The spelling of 289670381 in words is "two hundred eighty-nine million, six hundred seventy thousand, three hundred eighty-one".