289977393 has 8 divisors (see below), whose sum is σ = 389232000. Its totient is φ = 192020528.

The previous prime is 289977377. The next prime is 289977403. The reversal of 289977393 is 393779982.

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 289977393 - 2⁴ = 289977377 is a prime.

It is not an unprimeable number, because it can be changed into a prime (289975393) 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 7 ways as a sum of consecutive naturals, for example, 323913 + ... + 324806.

It is an arithmetic number, because the mean of its divisors is an integer number (48654000).

Almost surely, 2^289977393 is an apocalyptic number.

It is an amenable number.

289977393 is a deficient number, since it is larger than the sum of its proper divisors (99254607).

289977393 is a wasteful number, since it uses less digits than its factorization.

289977393 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 648871.

The product of its digits is 5143824, while the sum is 57.

The square root of 289977393 is about 17028.7225886148. The cubic root of 289977393 is about 661.8933945708.

The spelling of 289977393 in words is "two hundred eighty-nine million, nine hundred seventy-seven thousand, three hundred ninety-three".