289672139 has 8 divisors (see below), whose sum is σ = 296110080. Its totient is φ = 283245736.

The previous prime is 289672111. The next prime is 289672147. The reversal of 289672139 is 931276982.

It is a happy number.

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 289672139 - 2⁸ = 289671883 is a prime.

It is a super-2 number, since 2×289672139² = 167819896225670642, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (47).

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 289672093 and 289672102.

It is not an unprimeable number, because it can be changed into a prime (289672109) 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, 65492 + ... + 69774.

It is an arithmetic number, because the mean of its divisors is an integer number (37013760).

Almost surely, 2^289672139 is an apocalyptic number.

289672139 is a deficient number, since it is larger than the sum of its proper divisors (6437941).

289672139 is a wasteful number, since it uses less digits than its factorization.

289672139 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5769.

The product of its digits is 326592, while the sum is 47.

The square root of 289672139 is about 17019.7573131934. The cubic root of 289672139 is about 661.6610585920.

The spelling of 289672139 in words is "two hundred eighty-nine million, six hundred seventy-two thousand, one hundred thirty-nine".